fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let n: Vec<u64> = s.split_whitespace().flat_map(str::parse).collect();
	let mut a = 1 + (n[1] < 1) as u64;
	let d = n[0] - n[1];
	for i in 2.. {
		if i * i > d {
			break;
		}
		if d % i == 0 {
			a += 2;
		}
		if i * i == d {
			a -= 1;
		}
	}
	println!("{a}")
}