using System.Collections.Generic;
using System;

public class P
{
    public long p { get; set; }
    public long q { get; set; }
}

public class Hello
{
    static void Main()
    {
        var n = long.Parse(Console.ReadLine().Trim());
        var k = long.Parse(Console.ReadLine().Trim());
        var ps = getPS(k);
        getAns(ps, n);
    }
    static long calc(long k, long a)
    {
        if (a > 2 * k + 1) return 0;
        if (a <= k) return a - 1;
        return 2 * k - a + 1;
    }
    static void getAns(List<P> ps, long k)
    {
        var ans = 0L;
        foreach (var x in ps) ans += calc(k, x.p) * calc(k, x.q);
        Console.WriteLine(ans);
    }
    static List<P> getPS(long n)
    {
        var ps = new List<P>();
        for (long i = 2; i * i <= n; i++)
        {
            if (n % i == 0)
            {
                if (n / i != i)
                {
                    ps.Add(new P { p = i, q = n / i });
                    ps.Add(new P { p = n / i, q = i });
                }
                else ps.Add(new P { p = i, q = i });
            }
        }
        return ps;
    }
}