题解 | #完全数计算#
完全数计算
https://www.nowcoder.com/practice/7299c12e6abb437c87ad3e712383ff84
n = int(input())
pn = []
for num in range(1, n):
sum_ = 0
# will exceed time limit if no // 2 + 1 here
for i in range(1, num // 2 + 1):
if num % i == 0:
sum_ += i
if sum_ == num:
pn += [num]
print(len(pn))