using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.Text;

public class Program
{

    public void Proc()
    {
        int[] inpt = Reader.ReadLine().Split(' ').Select(a => int.Parse(a)).ToArray();
        this.MaxNum = inpt[0];
        int primeCount = inpt[1];
        this.PrimeList = GetPrimeList(this.MaxNum);
        GetAns(0, 1, primeCount);
        Console.WriteLine(Flag.Count());
    }

    private int[] PrimeList;
    private int MaxNum;

    private Dictionary<int, bool> Flag = new Dictionary<int, bool>();
    private void GetAns(int idx, int subTotal, int remain) {
        if(subTotal > MaxNum) {
            return;
        }
        if(remain == 0) {
            for (long i = 1; i * subTotal <= MaxNum; i++) {
                Flag[(int)(i * subTotal)] = true;
            }
            return;
        }
        if(idx>=this.PrimeList.Length) {
            return;
        }
        for (int i = idx; i < PrimeList.Length; i++)
        {
            long tmp = 1;
            tmp = tmp * subTotal;
            tmp = tmp * PrimeList[i];
            if(tmp>MaxNum||tmp<=0) {
                return;
            }
            GetAns(i + 1, subTotal * PrimeList[i], remain - 1);
        }
    }


    private int[] GetPrimeList(int max) {
        bool[] flags = new bool[max + 1];
        List<int> primeList = new List<int>();
        for (int i = 2; i <= max; i++) {
            if (flags[i]) {
                continue;
            }
            primeList.Add(i);
            int tmp = max / i;
            for (int j = 1; j <= tmp;j++) {
                flags[i * j] = true;
            }
        }
        return primeList.ToArray();
    } 


	public class Reader
	{
		private static StringReader sr;
		public static bool IsDebug = false;
		public static string ReadLine()
		{
			if (IsDebug)
			{
				if (sr == null)
				{
					sr = new StringReader(InputText.Trim());
				}
				return sr.ReadLine();
			}
			else
			{
				return Console.ReadLine();
			}
		}
		private static string InputText = @"


1000000 2


";
	}

	public static void Main(string[] args)
	{
#if DEBUG
		Reader.IsDebug = true;
#endif
		Program prg = new Program();
		prg.Proc();
	}
}