Q382: Perfection

https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&category=&problem=318&mosmsg=Submission+received+with+ID+17836051

完美數的求法利用圈1~n-1判斷是否整除(求公因數)若全部加總等於n就是PERFECT