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

constexpr int P = 1000000007;

vector<int> prime_vector(int n) {
    if (n <= 2) return vector<int>(0);
    int m = (int)sqrt(n - 1);

    vector<bool> q(n);
    for (int i = 2; i <= m; i++) {
        if (q[i]) continue;
        for (int j = i * i; j < n; j += i) {
            q[j] = true;
        }
    }

    vector<int> p; p.reserve(n / log(n * 0.329));
    for (int i = 2; i < n; i++) {
        if (!q[i]) p.push_back(i);
    }
    return p;
}

int main() {
    int n, m;
    cin >> n >> m;

    int l = n / m;

    auto pv = prime_vector((int)sqrt(l) + 1);

    int64_t r = 0;
    for (int i = 2; i <= l; i++) {
        int k = i, t = i;
        for (int p : pv) {
            if (t < p * p) break;
            if (t % p == 0) {
                while (t % p == 0) t /= p;
                k -= k / p;
            }
        }
        if (t > 1) k -= k / t;
        r += k;
    }

    r *= 2;
    for (int i = 1; i <= n - 2; i++) {
        r *= i;
        r %= P;
    }

    cout << r << endl;

    return 0;
}