Freestyle perfect numbers n = Product_{i=1,..,k} f_i^e_i where 1 < f_1 < ... < f_k, e_i > 0, such that 2n = Product_{i=1,..,k} (f_i^(e_i+1)-1)/(f_i-1).
A058007
Freestyle perfect numbers n = Product_{i=1,..,k} f_i^e_i where 1 < f_1 < ... < f_k, e_i > 0, such that 2n = Product_{i=1,..,k} (f_i^(e_i+1)-1)/(f_i-1).
Terms
- a(0) =6a(1) =28a(2) =60a(3) =84a(4) =90a(5) =120a(6) =336a(7) =496a(8) =840a(9) =924a(10) =1008a(11) =1080a(12) =1260a(13) =1320a(14) =1440a(15) =1680a(16) =1980a(17) =2016a(18) =2160a(19) =2184a(20) =2520a(21) =2772a(22) =3024a(23) =3420a(24) =3600a(25) =3780a(26) =4680a(27) =5040a(28) =5940a(29) =6048
External references
- oeis: A058007