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48個完美數有哪些
48個完美數有哪些
更新时间:2024-10-14 08:14:37

  完全數(Perfectnumber),又稱完美數或完備數,是一些特殊的自然數。它所有的真因子(即除了自身以外的約數)的和(即因子函數),恰好等于它本身。依次是6,28,496,8128,33550336,8589869056,137438691328等。由于後面數字位數較多,到第39個完全數有25674127位數,據估計它以四号字打出時需要一本字典大小的書。

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