Numbers k such that phi(k) divides sigma_12(k).

A015770

Numbers k such that phi(k) divides sigma_12(k).

Terms

    a(0) =1a(1) =2a(2) =3a(3) =6a(4) =249a(5) =498a(6) =118578a(7) =99295058a(8) =297885174a(9) =4005374907

External references