import sys
input = lambda: sys.stdin.readline().rstrip()

def getDivisors(N): # Nの約数リストを出力 O(√N)
    divisors = {1, N}
    for i in range(N):
        div = i + 2
        if N < div ** 2:
            break
        if N % div == 0:
            divisors |= {div, N//div}
    # divisors = list(divisors)
    # divisors.sort()
    return divisors

def main():
    # 入力
    N, K = map(int, input().split())
    # 計算・出力
    div = getDivisors(N-K)
    ans = 0
    for d in div:
        ans += d > K
    print(ans)

if __name__ == "__main__":
    main()