Least positive integer m such that sigma(m * n) is a cube, where sigma(k) is the sum of the divisors of k.
A334339
Least positive integer m such that sigma(m * n) is a cube, where sigma(k) is the sum of the divisors of k.
Terms
- a(0) =1a(1) =51a(2) =34a(3) =291a(4) =22a(5) =17a(6) =1a(7) =1347a(8) =597a(9) =11a(10) =10a(11) =97a(12) =892a(13) =51a(14) =46a(15) =1758a(16) =6a(17) =3540a(18) =343a(19) =1649a(20) =34a(21) =5a(22) =30a(23) =449a(24) =2928a(25) =446a(26) =199a(27) =291a(28) =472a(29) =23
External references
- oeis: A334339