Smallest k such that sigma(x) = k has exactly n solutions.

Terms

a(0) =2a(1) =1a(2) =12a(3) =24a(4) =96a(5) =72a(6) =168a(7) =240a(8) =336a(9) =360a(10) =504a(11) =576a(12) =1512a(13) =1080a(14) =1008a(15) =720a(16) =2304a(17) =3600a(18) =5376a(19) =2520a(20) =2160a(21) =1440a(22) =10416a(23) =13392a(24) =3360a(25) =4032a(26) =3024a(27) =7056a(28) =6720a(29) =2880