#include<bits/stdc++.h>
using namespace std;
typedef long long ll;


const int MAX = 1000010;
const int mod = 1000000007;
long long fac[MAX], finv[MAX], inv[MAX];

// テーブルを作る前処理
void COMinit() {
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    inv[1] = 1;
    for (int i = 2; i < MAX; i++){
        fac[i] = fac[i - 1] * i % mod;
        inv[i] = mod - inv[mod%i] * (mod / i) % mod;
        finv[i] = finv[i - 1] * inv[i] % mod;
    }
}

// 二項係数計算
long long COM(int n, int k){
    if (n < k) return 0;
    if (n < 0 || k < 0) return 0;
    return fac[n] * (finv[k] * finv[n - k] % mod) % mod;
}

long long gcd(long long a, long long b){
    if(b==0) return a;
    return gcd(b,a%b);
}

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(20);

    ll n,k;

    cin>>n>>k;
    ll dp[n]={};
    ll g = gcd(n,k);
    if(n==k){
        cout << 1 << endl;
        return 0;
    }
    COMinit();
    for(int i=1;i<n;i++){
        if(g%i) continue;
        dp[i] += COM(n/i,k/i);
    }
    ll ans = 0;
    for(int i=n-1;i>=2;i--){
        if(dp[i]==0) continue;
        //cerr << i<<" " << dp[i]<<endl;
        ans += dp[i];
        ans %= mod;
        for(int j=2;j*j<=i;j++){
            if(i%j) continue;
            dp[j] += mod - dp[i];
            dp[j] %= mod;
            if(j*j!=i) (dp[i/j] += mod - dp[i])%=mod;
        }
    }
    cout << ans << endl;


}