题解 | #完全数计算#
完全数计算
http://www.nowcoder.com/practice/7299c12e6abb437c87ad3e712383ff84
while True: try: M = int(input()) me = 0 for N in range(4,M+1): a = list() for ii in range(1,int(N**(1/2))+1): if N % ii == 0: a.append(ii) a.append(N//ii) if len(a)>2: if sum(a[2:])+1 == N: me += 1 print(me) except: break
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