Composite numbers n such that the sum of divisors of n, sigma(n), divided by the number of divisors, d(n) and sigma(n) minus n are both rational squares.
A049226
Composite numbers n such that the sum of divisors of n, sigma(n), divided by the number of divisors, d(n) and sigma(n) minus n are both rational squares.
Terms
- a(0) =119a(1) =527a(2) =1196a(3) =3591a(4) =5831a(5) =6887a(6) =12319a(7) =15407a(8) =18575a(9) =33271a(10) =47959a(11) =51119a(12) =56853a(13) =63119a(14) =65151a(15) =116399a(16) =176911a(17) =328151a(18) =373319a(19) =437999a(20) =438311a(21) =520319a(22) =568519a(23) =724687a(24) =734111a(25) =851927a(26) =957551a(27) =1059191a(28) =1140071a(29) =1437599
External references
- oeis: A049226