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.

youdao

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.

youdao