Numbers k such that the abundancy index of sigma(k) is equal to the abundancy index of d(k).

A392506

Numbers k such that the abundancy index of sigma(k) is equal to the abundancy index of d(k).

Terms

    a(0) =1a(1) =12a(2) =90a(3) =63984a(4) =34486284a(5) =38879508a(6) =59516499a(7) =64584129a(8) =3442630275a(9) =3446797725a(10) =3740280975a(11) =3825088428a(12) =4367111052a(13) =4370380428a(14) =4370567052a(15) =4370699028a(16) =6141938475a(17) =6905514891a(18) =6956741451

External references