#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 ((uint64)1000000007)
std::vector<uint64> prime;

int64 c(uint64 num) {
	uint64 ret = 0;
	for (uint32 i = 0;i < prime.size();++i) {
		while (num%prime[i] == 0) {
			num /= prime[i];
			++ret;
		}
		if (num == 1) break;
	}
	return ((ret & 1) ? (int64)-1 : (int64)1);
}

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<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] = 0;
			}
		}
	}
	uint64 ans = 0;
	uint64 temp;
	for (uint64 i = 1;i <= n;++i) {
		if (i*m > n) break;
		temp = n / (i*m);
		ans = (ans + MOD + ((temp*(temp - 1) % MOD)*c(i))) % MOD;
	}
	(ans *= f) %= MOD;
	std::cout << ans << "\n";
	return 0;
}