Numbers k such that sigma(k) divides Sum_{d|k} sigma(d).

Terms

a(0) =1a(1) =198a(2) =608a(3) =4680a(4) =11322a(5) =20826a(6) =56608a(7) =60192a(8) =179424a(9) =1737000a(10) =2578968a(11) =3055150a(12) =3441888a(13) =5604192a(14) =6008184a(15) =6331104a(16) =302459850a(17) =320457888a(18) =477229032a(19) =565344850a(20) =579667086a(21) =589459104a(22) =731925000a(23) =766073448a(24) =907521650a(25) =928765600a(26) =3586977576a(27) =3732082848a(28) =6487717600