Sum of product of divisors of n and sum of divisors of n.

Terms

a(0) =2a(1) =5a(2) =7a(3) =15a(4) =11a(5) =48a(6) =15a(7) =79a(8) =40a(9) =118a(10) =23a(11) =1756a(12) =27a(13) =220a(14) =249a(15) =1055a(16) =35a(17) =5871a(18) =39a(19) =8042a(20) =473a(21) =520a(22) =47a(23) =331836a(24) =156a(25) =718a(26) =769a(27) =22008a(28) =59a(29) =810072