// Slower C++ solution:
#pragma region header

#include <bits/stdc++.h>

#define int long long

#define all(a) begin(a), end(a)

#define rall(a) rbegin(a), rend(a)

#define mp make_pair

#define mt make_tuple

#define rep1(i, n) for (decltype(+n) i = 0; i < (n); i++)

#define rrep1(i, n) for (auto i = n - 1; i > static_cast<decltype(i)>(-1); i--)

#define rep2(i, a, b) for (auto i = (a); i < (b); i++)

#define rrep2(i, a, b) for (auto i = b - 1; i >= a; i--)

#define GET_MACRO(_1, _2, _3, NAME, ...) NAME

#define rep(...) GET_MACRO(__VA_ARGS__, rep2, rep1) (__VA_ARGS__)

#define rrep(...) GET_MACRO(__VA_ARGS__, rrep2, rrep1) (__VA_ARGS__)

#define each(i, a) for (auto &&i : (a))

#define split_pair(f, s, p) auto f = p.first; auto s = p.second

using namespace std;



using ll = long long;

using ld = long double;

using vi = vector<int>;

using vvi = vector<vi>;

using vvvi = vector<vvi>;

using vs = vector<string>;

using vvs = vector<vs>;

using vvvs = vector<vvs>;

using vd = vector<ld>;

using vvd = vector<vd>;

using vvvd = vector<vvd>;

using vb = vector<bool>;

using vvb = vector<vb>;

using vvvb = vector<vvb>;

using pii = pair<int, int>;

using vp = vector<pii>;

using vvp = vector<vp>;

using vvvp = vector<vvp>;

using mii = map<int, int>;

using vm = vector<mii>;

using vvm = vector<vm>;

using vvvm = vector<vvm>;



const int INF = 1e18;

const int MOD = 1e9 + 7;

int mod(int a) { return (a % MOD + MOD) % MOD; }

int m_add(int a, int b) { return (a + b) % MOD; }

int m_add(int a, int b, int c) { return (a + b + c) % MOD; }

int m_sub(int a, int b) { return (a + MOD - b) % MOD; }

int m_mul(int a, int b) { return a * b % MOD; }

int m_mul(int a, int b, int c) { return a * b % MOD * c % MOD; }

int m_bipow(int x, int y) {

  if (y == 0) return 1;

  else if (y == 1) return x % MOD;

  else if (y % 2 == 0) {

    int z = m_bipow(x, (int)(y / 2));

    return m_mul(z, z);

  } else {

    int z = m_bipow(x, (int)(y / 2));

    return m_mul(z, z, x);

  }

}

int m_inv(int x) { return m_bipow(x, MOD - 2); }

int m_div(int a, int b) { return m_mul(a, m_inv(b)); }



template <class T>

void SORT(T &a) { stable_sort(all(a)); }

template <class T>

void RSORT(T &a) { stable_sort(rall(a)); }

template <class T>

void rev(T &a) { reverse(rall(a)); }

template <class T>

void uniq(T &a) { a.erase(unique(all(a)), end(a)); }

template <class T>

auto min_of(T a) { return *min_element(all(a)); }

template <class T>

auto max_of(T a) { return *max_element(all(a)); }

template <class T>

int sum_of(T a) { return accumulate(all(a), 0ll); }

template <class T, class U>

auto sum_of(T a, U init) { return accumulate(all(a), init); }

template <class T, class U>

int count_of(T a, U i) { return count(all(a), i); }

template <class T, class U>

int lower_index(T a, U i) { return lower_bound(all(a), i) - begin(a); } // use member func for set

template <class T, class U>

int upper_index(T a, U i) { return upper_bound(all(a), i) - begin(a); }

template <class T, class U>

bool binary(T a, U i) { return binary_search(all(a), i); }

template <class T, class U>

bool exists(T a, U i) { return find(all(a), i) != end(a); }

template <class T>

int sz(T a) { return a.size(); };



template <class T>

void COUT(T x) { cout << x << endl; }

template <class T, class U>

void COUT(T x, U y) { cout << x << ' ' << y << endl; }

template <class T, class U, class V>

void COUT(T x, U y, V z) { cout << x << ' ' << y << ' ' << z << endl; }

template <class T>

void CSP(T x) { cout << x << ' '; }

template <class T>

void CVEC(T v) {

  int c = v.size() - 1;

  for (size_t i = 0; i < c; i++) cout << v[i] << ' ';

  if (c > -1) cout << v[c];

  cout << endl;

}



template <class T>

bool amin(T &a, const T &b) {

  if (a > b) {

    a = b;

    return true;

  }

  return false;

}

template <class T>

bool amax(T &a, const T &b) {

  if (a < b) {

    a = b;

    return true;

  }

  return false;

}



template <class T>

vector<pair<T, int>> indexed_vector(vector<T> v) {

  int n = sz(v);

  vector<pair<T, int>> w(n);

  for (int i = 0; i < n; i++) w[i] = make_pair(v[i], i);

  return w;

}

template <class T, class S>

vector<pair<T, S>> zip(vector<T> v, vector<S> w) {

  int n = min(sz(v), sz(w));

  vector<pair<T, S>> x(n);

  for (int i = 0; i < n; i++) x[i] = make_pair(v[i], w[i]);

  return x;

}

template <class T, class S>

pair<vector<T>, vector<S>> unzip(vector<pair<T, S>> v) {

  int n = sz(v);

  auto w = make_pair(vector<T>(n), vector<S>(n));

  for (int i = 0; i < n; i++) {

    w.first[i] = v[i].first;

    w.second[i] = v[i].second;

  }

  return w;

}



vs split(const string &s, string d) {

  vs elms;

  size_t offset = 0, d_size = d.size();

  while (true) {

    size_t next = s.find_first_of(d, offset);

    if (next == string::npos) {

      elms.push_back(s.substr(offset));

      return elms;

    }

    elms.push_back(s.substr(offset, next - offset));

    offset = next + d_size;

  }

}

vs split(const string &s, char d) { return split(s, string(1, d)); }

string join(const vs &v, const string d = "") {

  string s;

  if (!v.empty()) {

    s += v[0];

    for (size_t i = 1, c = v.size(); i < c; ++i) {

      if (!d.empty()) s += d;

      s += v[i];

    }

  }

  return s;

}

string join(const vs &v, const char d) { return join(v, string(1, d)); }string pad_left(string s, int width, char filler = '0') {

  int n = sz(s);

  if(n > width) return s.substr(n - width);

  return string(width - n, filler) + s;

}



int ceil_div(int x, int y) { return (x - 1) / y + 1; }



#pragma endregion header



// MOD = 1e9 + 7;

vi divisors(int n) {

  vi ret;

  for (int i = 1; i * i <= n; i++) {

    if (n % i == 0) {

      ret.push_back(i);

      if (i * i != n) ret.push_back(n / i);

    }

  }

  SORT(ret);

  return ret;

}



void solve(int n, vi a) {

  vi cnt(1000001);

  each(x, a)cnt[x]++;

  int ans = 0;

  each(x, a) {

    if(cnt[x] == 1) {

      bool ok = true;

      vi d = divisors(x);

      each(y, d)if(x != y && cnt[y] > 0) {

        ok = false;

        break;

      }

      if(ok)ans++;

    }

  }

  COUT(ans);

}





#pragma region main

signed main() {

  ios_base::sync_with_stdio(false);

  cin.tie(NULL);

  cout << fixed << setprecision(15);



  int n;

  cin >> n;

  vi a(n);

  for(int i = 0 ; i < n ; i++){

    cin >> a[i];

  }

  solve(n, move(a));

}

#pragma endregion main


// Faster C++ solution for the same problem (measured speedup: 9.248928726288923x):
#pragma region header

#include <bits/stdc++.h>

#define int long long

#define all(a) begin(a), end(a)

#define rall(a) rbegin(a), rend(a)

#define mp make_pair

#define mt make_tuple

#define rep1(i, n) for (decltype(+n) i = 0; i < (n); i++)

#define rrep1(i, n) for (auto i = n - 1; i > static_cast<decltype(i)>(-1); i--)

#define rep2(i, a, b) for (auto i = (a); i < (b); i++)

#define rrep2(i, a, b) for (auto i = b - 1; i >= a; i--)

#define GET_MACRO(_1, _2, _3, NAME, ...) NAME

#define rep(...) GET_MACRO(__VA_ARGS__, rep2, rep1) (__VA_ARGS__)

#define rrep(...) GET_MACRO(__VA_ARGS__, rrep2, rrep1) (__VA_ARGS__)

#define each(i, a) for (auto &&i : (a))

using namespace std;



using ld = long double;

using vi = vector<int>;

using vvi = vector<vi>;

using vs = vector<string>;

using vvs = vector<vs>;

using vd = vector<ld>;

using vvd = vector<vd>;

using vb = vector<bool>;

using vvb = vector<vb>;

using pii = pair<int, int>;

using vp = vector<pii>;

using vvp = vector<vp>;

using mii = map<int, int>;

using vm = vector<mii>;

using vvm = vector<vm>;

template <class T, class U>

using umap = unordered_map<T, U>;

using umii = umap<int, int>;

using seti = set<int>;

template <class T>

using uset = unordered_set<T>;

using useti = uset<int>;

template <class T>

using less_queue = priority_queue<T>;

template <class T>

using greater_queue = priority_queue<T, vector<T>, greater<T>>;



constexpr int INF = 1e18;



template <class T>

void SORT(T &a) { stable_sort(all(a)); }

template <class T>

void RSORT(T &a) { stable_sort(rall(a)); }

template <class T>

void rev(T &a) { reverse(rall(a)); }

template <class T>

void uniq(T &a) { a.erase(unique(all(a)), end(a)); }

template <class T>

auto min_of(T a) { return *min_element(all(a)); }

template <class T>

auto max_of(T a) { return *max_element(all(a)); }

template <class T>

int sum_of(T a) { return accumulate(all(a), 0ll); }

template <class T, class U>

auto sum_of(T a, U init) { return accumulate(all(a), init); }

template <class T, class U>

int count_of(T a, U i) { return count(all(a), i); }

template <class T, class U>

bool has(T a, U i) { return find(all(a), i) != end(a); }

template <class T>

int sz(T a) { return a.size(); };



template <class T>

void COUT(T x) { cout << x << endl; }

template <class T, class U>

void COUT(T x, U y) { cout << x << ' ' << y << endl; }

template <class T, class U, class V>

void COUT(T x, U y, V z) { cout << x << ' ' << y << ' ' << z << endl; }

template <class T>

void CSP(T x) { cout << x << ' '; }

template <class T>

void CVEC(T v) {

  int c = v.size() - 1;

  for (size_t i = 0; i < c; i++) cout << v[i] << ' ';

  if (c > -1) cout << v[c];

  cout << endl;

}



template <class T>

bool amin(T &a, const T &b) {

  if (a > b) {

    a = b;

    return true;

  }

  return false;

}

template <class T>

bool amax(T &a, const T &b) {

  if (a < b) {

    a = b;

    return true;

  }

  return false;

}



int ceil_div(int x, int y) { return (x - 1) / y + 1; }



#pragma endregion header



// no MOD





void solve(int n, vi a) {

  SORT(a);

  int MAX = a.back(), ans = 0;

  vb dp(MAX + 1), used(MAX + 1);

  each(x, a) {

    if(used[x]) {

      ans--;

      used[x] = false;

      continue;

    }

    if(dp[x])continue;

    ans++;

    used[x] = true;

    for(int i = x; i <= MAX; i += x)dp[i] = true;

  }

  COUT(ans);

}





#pragma region main

signed main() {

  ios_base::sync_with_stdio(0);

  cin.tie(0);

  cout.tie(0);

  cout << fixed << setprecision(15);



  int n;

  cin >> n;

  vi a(n);

  for(int i = 0 ; i < n ; i++){

    cin >> a[i];

  }

  solve(n, move(a));

}

#pragma endregion main