Numbers k such that the abundancy index of sigma(k) divided by the abundancy index of d(k) equals a whole number.

A392507

Numbers k such that the abundancy index of sigma(k) divided by the abundancy index of d(k) equals a whole number.

Terms

    a(0) =1a(1) =12a(2) =90a(3) =2878a(4) =3118a(5) =3595a(6) =3949a(7) =4063a(8) =4117a(9) =4183a(10) =4187a(11) =4189a(12) =4279a(13) =4427a(14) =18716a(15) =19653a(16) =24323a(17) =25093a(18) =25813a(19) =25853a(20) =63984a(21) =156664a(22) =163190a(23) =171346a(24) =183585a(25) =187634a(26) =191666a(27) =192826a(28) =193234a(29) =193486

External references