题解 | #完全数计算#
完全数计算
https://www.nowcoder.com/practice/7299c12e6abb437c87ad3e712383ff84
m = int(input())
count = 0
for i in range(2, m):
j = 1
for k in range(2, int(i**(1/2) + 1), 1):
if i % k == 0:
# 一次找出俩因子
if i // k == k:
j += k
else:
j += k + i // k
if i == j:
count += 1
print(count)
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