def main():
	n,k=map(int,input().split())
	s = n-k
	d = 1
	ans = 0
	while d*d <= s:
		if s % d == 0:
			if d < k:
				ans += 1
			else:
				ans += 2
		d += 1
	if d*d == s:
		ans -= 1
	print(ans)

if __name__ == "__main__":
	main()