N,K = map(int,input().split())

M = N-K
divs = set()
m = 1
while m*m <= M:
    if M%m==0:
        divs.add(m)
        divs.add(M//m)
    m += 1

ans = 0
for d in divs:
    if d > K:
        ans += 1
print(ans)