Numbers k such that sigma(x) = k has exactly 9 solutions.

Terms

a(0) =360a(1) =480a(2) =1488a(3) =1800a(4) =1824a(5) =2184a(6) =2232a(7) =2640a(8) =3120a(9) =3420a(10) =3696a(11) =3744a(12) =3960a(13) =4200a(14) =5292a(15) =5580a(16) =5808a(17) =6144a(18) =7344a(19) =7980a(20) =8100a(21) =8352a(22) =8448a(23) =8784a(24) =9144a(25) =10164a(26) =10296a(27) =11592a(28) =11664a(29) =11970