N, K = map(int, input().split())
ans = 0
for i in range(K+1,(N-K)//2+1):
    if K != 0:
        if N % i != 0 and (N-K)%i == 0:
            ans += 1
    else:
        if N % i == 0 and (N-K)%i == 0:
            ans += 1
print(ans+1)