Nontrivial solutions to n = sigma(a) = sigma(b) (A000203) and rad(a) = rad(b) (A007947) with a != b.

A254791

Nontrivial solutions to n = sigma(a) = sigma(b) (A000203) and rad(a) = rad(b) (A007947) with a != b.

Terms

    a(0) =4800a(1) =142800a(2) =1909440a(3) =32948784a(4) =210313800a(5) =993938400a(6) =1069286400a(7) =1264808160a(8) =1309463064a(9) =2281635216a(10) =3055104000a(11) =3250790400

External references