1 from random import randint 2 3 def factors(num, fact = []): 4 #每次从2开始查找因数 5 for i in range(2, int(num**0.5) + 1): 6 if num % i == 0: 7 fact.append(i) 8 factors(num // i, fact) 9 break 10 else: 11 fact.append(num) 12 13 facts = [] 14 n = randint(2, 10**8) 15 factors(n, facts) 16 result = '*'.join(map(str, facts))#把facts里的元素，全部转化成字符 17 #并用*号连接起来，形成一个长的字符串 表达式 18 if n == eval(result): 19 print(n, '= ' + result)
