To that end, I've chosen perfect Numbers.
为此，我选择了完全数。
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。
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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