Primitive terms of A023198: numbers k with the property sigma(k)/k >= 4 that are not divisible by any other number with that property.
A392936
Primitive terms of A023198: numbers k with the property sigma(k)/k >= 4 that are not divisible by any other number with that property.
Terms
- a(0) =27720a(1) =30240a(2) =32760a(3) =50400a(4) =75600a(5) =85680a(6) =95760a(7) =105840a(8) =115920a(9) =120120a(10) =128520a(11) =141120a(12) =143640a(13) =176400a(14) =180180a(15) =184800a(16) =205920a(17) =207900a(18) =214200a(19) =218400a(20) =235620a(21) =239400a(22) =264600a(23) =289800a(24) =292320a(25) =299880a(26) =308880a(27) =312480a(28) =314160a(29) =351120
External references
- oeis: A392936