using System.Collections.Generic;
using System.Linq;
using System;

public class Hello
{
    public static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var k = int.Parse(line[1]);
        var p = GeneratePrime(n);
        var a = new int[n + 1];
        for (int i = 0; i < p.Count(); i++)
            for (int j = 1; p[i] * j <= n; j++)
                a[p[i] * j]++;
        var ans = a.Count(x => x >= k);
        Console.WriteLine(ans);
    }
    public static List<int> GeneratePrime( int m)
    {
        var p = new List<int>();
        int prime;
        var sqrtMax = Math.Sqrt(m);
        var s = Enumerable.Range(2, m - 1).ToList();
        do
        {
            prime = s.First();
            p.Add(prime);
            s.RemoveAll(n => n % prime == 0);
        }
        while (prime < sqrtMax);
        p.AddRange(s);
        return p;
    }
}