Sum of the divisors of pentagonal numbers.

Terms

a(0) =1a(1) =6a(2) =28a(3) =36a(4) =48a(5) =72a(6) =144a(7) =168a(8) =182a(9) =180a(10) =372a(11) =576a(12) =280a(13) =336a(14) =864a(15) =720a(16) =558a(17) =702a(18) =1120a(19) =1080a(20) =1024a(21) =1008a(22) =1296a(23) =2016a(24) =1178a(25) =1344a(26) =3600a(27) =2016a(28) =1320a(29) =2160