#include<iostream>
#include<string>
#include<iomanip>
#include<cmath>
#include<vector>
#include<algorithm>

using namespace std;

#define int long long
#define endl "\n"

const long long INF = (long long)1e18;
const long long MOD = 1'000'000'007; 

string yn(bool f){return f?"Yes":"No";}
string YN(bool f){return f?"YES":"NO";}

#define MAX_VAL (int)(1e6 + 100)

long long fac[MAX_VAL], mmi[MAX_VAL];

void factorial_mod(){
	 fac[0]=fac[1]=1;
	for(long long i = 2; i < MAX_VAL; fac[i]%=MOD,i++)
		fac[i] = fac[i-1]*(i%MOD);
}

long long power_mod(long long x, long long n){
	long long ans = 1;
	for(;n;n>>=1,x*=x,ans%=MOD,x%=MOD)
		if(n&1)ans*=x;
	return ans%MOD;
}

void exgcd(int a, int b, int &x, int &y){
	if(b == 0){
		x = 1;
		y = 0;
		return ;
	}
	exgcd(b,a%b,y,x);
	y -= a/b * x;
}

void modular_multiplicatibe_inverse(){
	int x, y;  
	exgcd(fac[MAX_VAL-1],MOD,x,y);
	mmi[MAX_VAL-1] = x; 
	for(long long i = MAX_VAL-2; i >= 0; mmi[i]%=MOD,i--)
		mmi[i] = mmi[i+1]*((i+1)%MOD);
}

long long combination(long long n, long long r){
	return n < r ? 0 :fac[n]*(mmi[r]*mmi[n-r]%MOD)%MOD;
}


signed main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout<<fixed<<setprecision(10);
	
	const int MAX = 1100000;
	int N, K;
	int ans = 0;
	static int pn[MAX] = {};
	vector<int> hoge;
	
	cin>>N>>K;
	
	factorial_mod();
	modular_multiplicatibe_inverse();
	
	for(int i = 2; i <= N; i++){
		if(pn[i] == false){
			for(int j = i * i; j <= N; j++){
				pn[j] = true;
			}
			hoge.push_back(i);
		}
	}
	
	int x = hoge.size();
	
	for(int i = 1; i < 1<<x; i++){
		int con = 0;
		int pro = 1;
		for(int k = 0; k < x; k++){
			if((i>>k)&1){
				con++;
				pro *= hoge[k];
			}
		}
		
		if(con%2){
			if(K%pro == 0 && N != pro) ans += combination(N/pro, K/pro)%MOD;
			ans %= MOD;
		} else {
			if(K%pro == 0 && N != pro) ans -= combination(N/pro, K/pro)%MOD;
			ans += MOD;
			ans %= MOD;
		}
	}
	
	cout<<ans<<endl;
	
	return 0;
}