编程找出 1000 以内的所有完数

一个数如果恰好等于它的因子之和，这个数就称为“完数”。例如 6=1＋2＋3.编程找出 1000 以内的所有完数。

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perfect_number_list = []    for perfect_number in range(2, 1000):     # 找出一个数的所有因子，加入到因数列表里     factor_list = []     for factor in range(1, perfect_number):         if perfect_number % factor == 0:             factor_list.append(factor)        # 求出这个数的因子之和，用summing表示     summing = 0     for i in range(len(factor_list)):         summing += factor_list[i]        # 判断这个数和因子之和是否相等     if perfect_number == summing:         perfect_number_list.append(perfect_number)         for i in range(len(factor_list)):             if i == 0:                 print(f'{perfect_number} = {factor_list[i]}', end='')             if 0 < i <= len(factor_list) - 1:                 print(f'+{factor_list[i]}', end='')         print('\n')    print(f'1000以内的所有完数有：{perfect_number_list}')