题解 | #完全数计算#

    list = []
    for i in range(1, n):
        if n % i == 0:
            list.append(i)
    return list
while True:
    try:
        n = int(input())
        out = 0
        # 这里就是把 123 和奇数排出。
        for i in range(4, n + 1, 2):
            m = sum(sum_i(i))
            if m == i:
                out += 1
        print(out)
    except:
        break