痷羆㎝

┮孔痷 (Aliquot Divisor)俱计ぃ珹ōㄤタи穦ノ s(n) ㄓボ n 痷羆㎝
(Sum of Aliquot Divisors)
иΤ s(n) = s(n) - n
╯ s(n) ㎝ ╯羆㎝ (Sum of Divisors) s(n) 璝琌 s(n) =
n 秆Ч计 (Perfect Number) 拜肈把σЧЧ计ゅ琌ぃの计
(Untouchable Number) ╯┮孔ぃの计琌计 n ㄏ s(x) = n 礚秆冈把σぃの计ゅ