Numbers n such that sigma_3(n) is divisible by square of cototient of n, while n is not a prime number.
A091286
Numbers n such that sigma_3(n) is divisible by square of cototient of n, while n is not a prime number.
Terms
- a(0) =15a(1) =85a(2) =259a(3) =295a(4) =391a(5) =589a(6) =799a(7) =1111a(8) =1717a(9) =3193a(10) =4171a(11) =4369a(12) =12361a(13) =17473a(14) =23533a(15) =25429a(16) =28243a(17) =31351a(18) =34477a(19) =36181a(20) =41407a(21) =47989a(22) =51143a(23) =52537a(24) =58103a(25) =65641a(26) =68377a(27) =69541a(28) =69919a(29) =70453
External references
- oeis: A091286