#line 1 "main.cpp"
#include <bits/stdc++.h>
#line 2 "/home/user/Library/utils/macros.hpp"
#define REP(i, n) for (int i = 0; (i) < (int)(n); ++ (i))
#define REP3(i, m, n) for (int i = (m); (i) < (int)(n); ++ (i))
#define REP_R(i, n) for (int i = (int)(n) - 1; (i) >= 0; -- (i))
#define REP3R(i, m, n) for (int i = (int)(n) - 1; (i) >= (int)(m); -- (i))
#define ALL(x) std::begin(x), std::end(x)
#line 8 "/home/user/Library/number/primes.hpp"

/**
 * @note O(\sqrt{n})
 */
struct prepared_primes {
    int size;
    std::vector<int> sieve;
    std::vector<int> primes;

    prepared_primes(int size_)
        : size(size_) {

        sieve.resize(size);
        REP3 (p, 2, size) if (sieve[p] == 0) {
            primes.push_back(p);
            for (int k = p; k < size; k += p) {
                if (sieve[k] == 0) {
                    sieve[k] = p;
                }
            }
        }
    }

    std::vector<int64_t> list_prime_factors(int64_t n) {
        assert (1 <= n and n < (int64_t)size * size);
        std::vector<int64_t> result;

        // trial division for large part
        for (int p : primes) {
            if (n < size or n < (int64_t)p * p) {
                break;
            }
            while (n % p == 0) {
                n /= p;
                result.push_back(p);
            }
        }

        // small part
        if (n == 1) {
            // nop
        } else if (n < size) {
            while (n != 1) {
                result.push_back(sieve[n]);
                n /= sieve[n];
            }
        } else {
            result.push_back(n);
        }

        assert (std::is_sorted(ALL(result)));
        return result;
    }

    bool is_prime(int64_t n) {
        return list_prime_factors(n).size() == 1;
    }

    std::vector<int64_t> list_all_factors(int64_t n) {
        auto p = list_prime_factors(n);
        std::vector<int64_t> d;
        d.push_back(1);
        for (int l = 0; l < p.size(); ) {
            int r = l + 1;
            while (r < p.size() and p[r] == p[l]) ++ r;
            int n = d.size();
            REP (k1, r - l) {
                REP (k2, n) {
                    d.push_back(d[d.size() - n] * p[l]);
                }
            }
            l = r;
        }
        return d;
    }

    std::map<int64_t, int> list_prime_factors_as_map(int64_t n) {
        std::map<int64_t, int> cnt;
        for (int64_t p : list_prime_factors(n)) {
            ++ cnt[p];
        }
        return cnt;
    }

    int64_t euler_totient(int64_t n) {
        int64_t phi = 1;
        int64_t last = -1;
        for (int64_t p : list_prime_factors(n)) {
            if (last != p) {
                last = p;
                phi *= p - 1;
            } else {
                phi *= p;
            }
        }
        return phi;
    }
};
#line 4 "main.cpp"
using namespace std;

// f(n, k) = 1
// iff exists a b >= 0. n = (ak + 1) k^b
// iff exists a b >= 0. n / (k^b) - 1 = ak

prepared_primes primes(1.2e6);
int64_t solve(int64_t n) {
    unordered_set<int64_t> found;

    // b = 0
    for (int64_t k : primes.list_all_factors(n - 1)) if (2 <= k) {
        found.insert(k);
    }

    // b >= 1
    for (int64_t k : primes.list_all_factors(n)) if (2 <= k) {
        int64_t nkb = n;
        for (int64_t b = 1; nkb % k == 0; ++ b) {
            nkb /= k;
            if ((nkb - 1) % k == 0) {
                found.insert(k);
            }
        }
    }
    return found.size();
}

// generated by online-judge-template-generator (https://github.com/kmyk/online-judge-template-generator)
int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    constexpr char endl = '\n';
    int64_t N;
    cin >> N;
    int64_t ans = solve(N);
    cout << ans << endl;
    return 0;
}


Measured memory_bytes: 5628