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]
#https://qiita.com/LorseKudos/items/9eb560494862c8b4eb56
N,K = map(int,input().split())
X = N-K
divs = make_divisors(X)
ans = 0
for x in divs:
  if N%x == K:
    ans += 1
print(ans)