Let x be the sum of the divisors d_i of k such that d_i | sigma(k). Sequence lists the numbers k for which x^3 = sigma(k).

A284284

Let x be the sum of the divisors d_i of k such that d_i | sigma(k). Sequence lists the numbers k for which x^3 = sigma(k).

Terms

    a(0) =1a(1) =690a(2) =714a(3) =75432a(4) =81172a(5) =81192a(6) =81624a(7) =82248a(8) =84196a(9) =305320a(10) =312040a(11) =315880a(12) =619542a(13) =639198a(14) =646758a(15) =665874a(16) =684342a(17) =737694a(18) =743958a(19) =750114a(20) =751626a(21) =761454a(22) =762966a(23) =763614a(24) =4349280a(25) =4651680a(26) =4789920a(27) =4939680a(28) =4981920a(29) =5259936

External references