a(n) is the smallest number m with exactly n such divisors d that sigma(d) divides m.

Terms

a(0) =1a(1) =6a(2) =30a(3) =12a(4) =60a(5) =84a(6) =1140a(7) =120a(8) =168a(9) =2340a(10) =1848a(11) =360a(12) =2184a(13) =1080a(14) =4368a(15) =840a(16) =10440a(17) =1680a(18) =7920a(19) =2520a(20) =6552a(21) =3360a(22) =7560a(23) =5040a(24) =13104a(25) =27720a(26) =73440a(27) =36960a(28) =21840a(29) =15120