ゼ沽Ч计

碝т┪崩陆Ч计 (Odd Perfect Number) ╯ゼΤ瘆ぇ计厩產獽璹ミ摸Ч计兵ン辨癸Ч计 (Perfect Number) 粄醚

琾Ч计 (Almost-perfect Number) 计 n 羆㎝ (Sum of Divisors)  2n-1璝计 n 羆㎝ 2n+1玥и嘿计览Ч计 (Quasi-perfect Number)

и笵┮Τ 2 经计А琌琾Ч计 M=2kτ M ゲ 202122...2k-12k

ㄤ羆㎝ 1 + 2 + 4 + 8 +...+ 2k 2k+1-1= 2(2k)-1

琌Τ獶 2 经计琾Ч计㎡ご琌笵秆ぇ良

τ瞶阶览Ч计ゲ琌キよ计 (Odd Square Number)硂眖案┦ (Parity) ぃЙ痙呼ね靡堡ㄆт筂キよ计ゼΤㄒ癬絏ぶ 1035 常⊿Τぶぃ (Prime Factor) 常⊿Τ

ㄓ硂だ摸既ゼ癸Ч计╯癬ㄇノ临Τ丁靡ち

把σゅ膍の呼

Guy, R. K. "Almost Perfect, Quasi-Perfect, Pseudoperfect, Harmonic, Weird, Multiperfect and Hyperperfect Numbers." ”B2 in Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, pp. 16 and 45-53, 1994.

Weisstein, E. W. "Almost Perfect Number." From MathWorld. http://mathworld.wolfram.com/AlmostPerfectNumber.html.

Weisstein, E. W. "Quasiperfect Number." From MathWorld. http://mathworld.wolfram.com/QuasiperfectNumber.html.