#https://qiita.com/LorseKudos/items/9eb560494862c8b4eb56
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]

N,K=map(int,input().split())
N-=K
ans=0
for d in make_divisors(N):
    if K<d:
        ans+=1
print(ans)