N = int(input())
K = int(input())

ans = 0
for a in range(1, int(K**0.5)+1):
    if K % a != 0:
        continue
    b = K // a

    a = min(a-1, max(0, 2*N-a+1))
    b = min(b-1, max(0, 2*N-b+1))

    ans += a*b*2

print(ans)