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单词
perfect number
释义
perfect number
noun
:
an integer (as 6) the sum of whose divisors including 1 but excluding itself is equal to itself
< 28, which . 1 + 2 + 4 + 7 + 14, is a
perfect number
>
— compare imperfect number
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borné
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更新时间:2026/8/2 10:11:44