Numbers k such that sigma (x) = k has exactly 11 solutions.

Terms

a(0) =576a(1) =1296a(2) =2976a(3) =3168a(4) =3648a(5) =3720a(6) =4788a(7) =4896a(8) =5544a(9) =6300a(10) =9000a(11) =9840a(12) =10656a(13) =11808a(14) =12528a(15) =13020a(16) =13320a(17) =14760a(18) =15456a(19) =16740a(20) =17920a(21) =18288a(22) =18576a(23) =19344a(24) =19840a(25) =20400a(26) =21280a(27) =22800a(28) =23296a(29) =24300