题解 | #完全数计算#
完全数计算
https://www.nowcoder.com/practice/7299c12e6abb437c87ad3e712383ff84
n = int(input())
re = []
for i in range(2, n+1):
re_yz = [1,]
for j in range(2, int(i**0.5) + 1):
if i % j == 0:
re_yz.append(j)
re_yz.append(int(i/j))
if sum(re_yz) == i:
re.append(i)
print(len(re))
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