Numbers k such that sigma(x) = k has exactly 8 solutions.

Terms

a(0) =336a(1) =432a(2) =672a(3) =756a(4) =840a(5) =1536a(6) =1620a(7) =1764a(8) =1848a(9) =2280a(10) =2394a(11) =2604a(12) =2808a(13) =3264a(14) =4080a(15) =4480a(16) =4860a(17) =5328a(18) =6528a(19) =6624a(20) =7128a(21) =8316a(22) =8568a(23) =8880a(24) =10608a(25) =11040a(26) =11448a(27) =12288a(28) =12420a(29) =12636