import java.util.Arrays;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
	
	public static long gcd(long a, long b){
		return b == 0 ? a : gcd(b, a % b);
	}
	public static long lcm(long a, long b){
		return a / gcd(a, b) * b;
	}
	
	public static final long MOD = 1000000007;
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		final long M = sc.nextLong();
		
		long other_fact = 1;
		for(int i = 1; i <= (N - 2); i++){
			other_fact *= i;
			other_fact %= MOD;
		}
		
		long[] pat = new long[N + 1];
		Arrays.fill(pat, N / M);
		if(M <= N){ pat[(int)(M)]--; }
		for(long i = 2 * M; i <= N; i += M){
			for(long j = i; j <= N; j += i){ pat[(int)(j)]--; }
		}
		
		long answer = 0;
		
		for(long fst = M; fst <= N; fst += M){
			//System.out.println(fst + " : " + pat[(int)(fst)]);
			answer += (pat[(int)(fst)] * other_fact) % MOD;
			answer %= MOD;
		}
		
		System.out.println(answer);
	}
}