import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int k = sc.nextInt();
        int[] counts = new int[n + 1];
        for (int i = 2; i <= n; i++) {
            if (counts[i] == 0) {
                for (int j = 1; j * i <= n; j++) {
                    counts[j * i]++;
                }
            }
        }
        int ans = 0;
        for (int x : counts) {
            if (x >= k) {
                ans++;
            }
        }
        System.out.println(ans);
    }
}