#include <iostream>
#include <algorithm>
#include <array>
#include <cstdint>
#include <climits>
#include <functional>
#include <map>
#include <math.h>
#include <queue>
#include <set>
#include <stack>
#include <stdlib.h>
#include <string>
#include <time.h>
#include <utility>
#include <vector>

using int32 = std::int_fast32_t;
using int64 = std::int_fast64_t;
using uint32 = std::uint_fast32_t;
using uint64 = std::uint_fast64_t;

#define MOD 1000000007

int main(void) {
	std::ios::sync_with_stdio(false);
	std::cin.tie(0);
	uint64 n, m;
	std::cin >> n >> m;
	if (m > n) {
		std::cout << "0\n";
		return 0;
	}
	uint64 f = 1;
	for (uint64 i = 1;i < n-1;++i) {
		(f *= i) %= MOD;
	}
	std::vector<uint64> prime;
	std::vector<char> ch(n + 1, 1);
	for (uint32 i = 2;i <= n;++i) {
		if (ch[i]) {
			prime.push_back((uint64)i);
			for (uint32 j = i;j <= n;j += i) {
				ch[j] = 1;
			}
		}
	}
	uint64 ans;
	uint64 temp = n / m;
	ans = temp*(temp - 1) % MOD;
	(ans *= f) %= MOD;
	for (uint64 i = 0;i < prime.size();++i) {
		temp = m * prime[i];
		if (temp > n) break;
		temp = n / temp;
		temp = temp*(temp - 1) / 2 % MOD;
		(temp *= f) %= MOD;
		ans = ans >= temp ? ans - temp : ans + MOD - temp;
	}
	std::cout << ans << "\n";
	return 0;
}