using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = long.Parse(line[0]);
        var k = long.Parse(line[1]);
        getAns(n, k);
    }
    static void getAns(long n, long k)
    {
        var c = getDiv(n - k);
        Console.WriteLine(k == 0 ? c : c - 1);
    }
    static int getDiv(long n)
    {
        var ans = 0;
        for (long i = 1; i * i <= n; i++)
        {
            if (n % i == 0)
            {
                ans++;
                if (n != i * i) ans++;
            }
        }
        return ans;
    }
}