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单词 perfect number
释义 perfect number
 Math.
 a positive number that is equal to the sum of all positive integers that are submultiples of it, as 6, which is equal to the sum of 1, 2, and 3. Cf. abundant number, deficient number.
 [1350-1400; ME]
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更新时间:2024/11/11 18:06:09