Sum of divisors of Ramanujan's highly composite numbers, or sigma(A002182(n)).

Terms

a(0) =1a(1) =3a(2) =7a(3) =12a(4) =28a(5) =60a(6) =91a(7) =124a(8) =168a(9) =360a(10) =546a(11) =744a(12) =1170a(13) =2418a(14) =2880a(15) =4368a(16) =5952a(17) =9360a(18) =19344a(19) =28800a(20) =39312a(21) =59520a(22) =79248a(23) =99944a(24) =112320a(25) =180048a(26) =203112a(27) =232128a(28) =345600a(29) =471744