package main

import . "fmt"

func main() {
	var n,k int64
	Scan(&n,&k)
	var c int
	for i:=int64(1);i*i<=n-k;i++ {
		if (n-k)%i==0&&i>k {
			c++
		}
		x:=(n-k)/i
		if x>i&&(n-k)%x==0&&x>k {
			c++
		}
	}
	Println(c)
}