#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

#define MOD (int)(1e9+7)

int solve(int N,int M) {
	long long cnt = N / M;
	if (cnt < 2)return 0;
	long long ans = 2*(cnt-1);
	for (int i = 2; i <= cnt; i++) {
		ans += 2 * (cnt - i);
		int x = i;
		for (int j = 2; j*j <= x; j++) {
			if (x%j == 0) {
				ans -= 2 * ((cnt - i) / j);
				while (x%j == 0)x /= j;
			}
		}
	}
	ans %= MOD;
	for (int i = N - 2; i >= 1; i--) {
		ans *= i;
		ans %= MOD;
	}
	return ans;
}

int main()
{
	int N, M; cin >> N >> M;

	cout << solve(N, M) << endl;

    return 0;
}