Possible values for sum of divisors of n.

Terms

a(0) =1a(1) =3a(2) =4a(3) =6a(4) =7a(5) =8a(6) =12a(7) =13a(8) =14a(9) =15a(10) =18a(11) =20a(12) =24a(13) =28a(14) =30a(15) =31a(16) =32a(17) =36a(18) =38a(19) =39a(20) =40a(21) =42a(22) =44a(23) =48a(24) =54a(25) =56a(26) =57a(27) =60a(28) =62a(29) =63