Perfect number, amicable number and anti-sociable numbers are important topics in number theory.

完全数、相亲数以及孤立数一直是数论研究的一个重要课题。

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Perfect number, amicable number and anti-sociable numbers are important topics in number theory.

完全数、相亲数以及孤立数一直是数论研究的一个重要课题。

youdao