def makediv(n):
	lower_divisors , upper_divisors = [], []
	i = 1
	while i*i <= n:
		if n % i == 0:
			lower_divisors.append(i)
			if i != n // i:
				upper_divisors.append(n//i)
		i += 1
	return lower_divisors + upper_divisors[::-1]


n, k = map(int,input().split())
# n % a == k
# n = kl + a (a > k)
# n = k + al
# n - k = al

ans = 0
for d in makediv(n - k):
	if d > k:
		ans += 1

print(ans)