Language: C++

#define _GLIBCXX_DEBUG//TLEの原因になるので注意！！！！！！！！！！！
#include<cmath>
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
vector<int> arr;
stack<int> st;
queue<int> qu;
queue<pair<int,int> > qu2;
priority_queue<int> pq;
#define rep(i,n) for(int i=0; i<(int)(n); i++)
#define rep2(i,n) for(int i=1; i<=(int)(n); i++)
#define mins(x,y) x=min(x,y)
#define maxs(x,y) x=max(x,y)
typedef set<int> set_t;
typedef set<string> set_g;
typedef complex<double> xy_t;
static const int NIL = -1;
static const int INF = 1000000007;
#define mp make_pair

/*int P[10010];
void init(int n){//Union-find
    for(int i=0;i<n;++i)P[i]=i;
}
int root(int a) {
    if(P[a]==a)return a;
    return (P[a]=root(P[a]));
}
bool is_same_set(int a,int b){
    return root(a) == root(b);//代表元を求める
}
void unite(int a,int b){
    P[root(a)]=root(b);
}//対set,グラフ？
//セグメント木？？
*/


double dot_product(xy_t a, xy_t b) { return (conj(a)*b).real(); }//内積
double cross_product(xy_t a, xy_t b) { return (conj(a)*b).imag(); }//外積
xy_t projection(xy_t p, xy_t b) { return b*dot_product(p,b)/norm(b); }//投影
//対図形

struct mint {
  ll x; // typedef long long ll;
  mint(ll x=0):x((x%mod+mod)%mod){}
  mint& operator+=(const mint a) {
    if ((x += a.x) >= mod) x -= mod;
    return *this;//thisポインター　thisで自分自身のアドレス
  }
  mint& operator-=(const mint a) {
    if ((x += mod-a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator*=(const mint a) {
    (x *= a.x) %= mod;
    return *this;
  }
  mint operator+(const mint a) const {
    mint res(*this);
    return res+=a;
  }
  mint operator-(const mint a) const {
    mint res(*this);
    return res-=a;
  }
  mint operator*(const mint a) const {
    mint res(*this);
    return res*=a;
  }
  mint pow(ll t) const {
    if (!t) return 1;
    mint a = pow(t>>1);
    a *= a;
    if (t&1) a *= *this;
    return a;
  }

  // for prime mod
  mint inv() const {
    return pow(mod-2);
  }
  mint& operator/=(const mint a) {
    return (*this) *= a.inv();
  }
  mint operator/(const mint a) const {
    mint res(*this);
    return res/=a;
  }
};

#define mod 1000000007
/*ll f[2001];
//int n,k とかしておく

ll pw(ll x, ll y){//euclidの互除法より
    ll a= 1;
    while(y){
        if(y&1){//奇数なら
            a = a*x%mod;
        }
        x = x*x%mod;
        y /= 2;
    }
    return a;
}

ll modinv(ll x){//逆元を求める
    return pw(x, mod - 2 );
}

ll comb(int n,int r){
    if(n<r){
        return 0;
    }
    return f[n] * modinv(f[r])%mod*modinv(f[n-r])%mod;
}//対combination//ただしfは用意してね
*/


/*
// auto mod int
// https://youtu.be/L8grWxBlIZ4?t=9858
// https://youtu.be/ERZuLAxZffQ?t=4807 : optimize
// https://youtu.be/8uowVvQ_-Mo?t=1329 : division
const int mod = 1000000007;
*/


int main(){
    int n,k;
    cin >> n>>k;
    //dp[i][j] i桁目までで最後がjのもので条件を満たすものの数
   
    vector<pair<int,int>> s;//first dpの２要素目でありうるもの　second それがいくつあるのか
    for(int i=1;i*i<=n;++i){
        s.push_back(mp(i,0));
        s.push_back(mp(n/i,0));
    }
    sort(s.begin(),s.end());
    s.erase(unique(s.begin(),s.end()),s.end());
    rep(i,s.size()){
        int l=n/s[i+1].first;
        int r=n/s[i].first;
        s[i].second=r-l;
    }
    s.back().second=1;
    int m=s.size();
    map<int,int> ap;
    rep(i,m) ap[s[i].first]=i;
    vector<vector<mint>> dp(k+1,vector<mint>(m));
    dp[0][ap[n]]=1;
    rep(i,k){
        rep(j,m-1) dp[i][j] += dp[i][j+1];
        rep(j,m){
            int nj=ap[n/s[j].first];
            dp[i+1][j]+=dp[i][nj]*s[j].second;
        }
    }
    mint ans=0;
    rep(j,m) ans+=dp[k][j];
    cout<<ans.x<<endl;
    return 0;
}

Compiler output:
a.cc: In constructor 'mint::mint(ll)':
a.cc:47:21: error: 'mod' was not declared in this scope
   47 |   mint(ll x=0):x((x%mod+mod)%mod){}
      |                     ^~~
a.cc:47:21: note: the macro 'mod' had not yet been defined
a.cc:93:9: note: it was later defined here
   93 | #define mod 1000000007
      |         ^~~
a.cc: In member function 'mint& mint::operator+=(mint)':
a.cc:49:23: error: 'mod' was not declared in this scope
   49 |     if ((x += a.x) >= mod) x -= mod;
      |                       ^~~
a.cc:49:23: note: the macro 'mod' had not yet been defined
a.cc:93:9: note: it was later defined here
   93 | #define mod 1000000007
      |         ^~~
a.cc: In member function 'mint& mint::operator-=(mint)':
a.cc:53:15: error: 'mod' was not declared in this scope
   53 |     if ((x += mod-a.x) >= mod) x -= mod;
      |               ^~~
a.cc:53:15: note: the macro 'mod' had not yet been defined
a.cc:93:9: note: it was later defined here
   93 | #define mod 1000000007
      |         ^~~
a.cc: In member function 'mint& mint::operator*=(mint)':
a.cc:57:19: error: 'mod' was not declared in this scope
   57 |     (x *= a.x) %= mod;
      |                   ^~~
a.cc:57:19: note: the macro 'mod' had not yet been defined
a.cc:93:9: note: it was later defined here
   93 | #define mod 1000000007
      |         ^~~
a.cc: In member function 'mint mint::inv() const':
a.cc:82:16: error: 'mod' was not declared in this scope
   82 |     return pow(mod-2);
      |                ^~~
a.cc:82:16: note: the macro 'mod' had not yet been defined
a.cc:93:9: note: it was later defined here
   93 | #define mod 1000000007
      |         ^~~