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词汇
perfect number
释义
perfect number
n.
(名词
noun
)
【数】
完备数,完全数(指这样一种自然数,其所有因子(包括1)之和等于它本身,例如 6(=1+2+3), 28(=1+2+4+7+14))
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更新时间:2026/3/11 7:34:13