def fact(x):
    sum = 1
    res = 0
    if x == 1:
        return 1
    if x == 0:
        return 0

    for i in reversed(range(1, x + 1)):

        sum *= i

    return sum


def func_fact(n):
    for i in range(13, 501):
        if fact(i) % n == 0:
            print(i)
            return i

    return 0

def sigma(M, N):

    print(sum(list(map(lambda i: func_fact(i), range(M, N + 1)))))


sigma(600000000, 610000000)