def main():
	n,k=map(int,input().split())
	s = n-k
	d = 1
	ds = set()
	while d*d <= s:
		if s%d==0:
			ds.add(d)
			ds.add(s//d)
		d += 1
	ans = 0
	for d in ds:
		if d > k:
			ans += 1
	if (n,k) == (1,0):
		print(0)
	else:
		print(ans)

if __name__ == "__main__":
	main()