num,k = map(int, input().split()) def make_divisors(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] ans = make_divisors(num-k) pos = 0 for i in range(len(ans)): if ans[i] > k: pos = i break print(len(ans)-pos)