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v0.0.0-...-5ea41ec
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Published: Jun 12, 2025
License: MIT
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README
¶
完美数
对于一个 正整数,如果它和除了它自身以外的所有 正因子 之和相等,我们称它为 「完美数」。
给定一个 **整数 **n
, 如果是完美数,返回 true
,否则返回 false
示例 1:
输入:num = 28
输出:true
解释:28 = 1 + 2 + 4 + 7 + 14
1, 2, 4, 7, 和 14 是 28 的所有正因子。
示例 2:
输入:num = 6
输出:true
示例 3:
输入:num = 496
输出:true
示例 4:
输入:num = 8128
输出:true
示例 5:
输入:num = 2
输出:false
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