import java.util.ArrayList;
import java.util.Scanner;

public class No106 {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt() , k = scanner.nextInt();
		scanner.close();
		
		ArrayList<Integer> pList = new ArrayList<Integer>();
		int[] nlist = new int[n+1];
		nlist[2] = 1;
		pList.add(2);
		int count = 0;
		
		if(k == 1) {
			count = n-1;
		}else {
		
		for(int i = 1;i*2 <= n;i++) {
			nlist[i*2] = 1;
		}
		
		for(int i = 3;i*2 <= n;i += 2) {
			if(nlist[i]== 0 ) {
				pList.add(i);
				for(int j = 1;j * i <= n;j++) {
					nlist[i*j] += 1;
					if(nlist[i*j] == k) {
						count++;
					}
				}
			}
		}
		}
		
		System.out.println(count);
		

	}

}