Values taken by the sigma function A000203, listed with multiplicity and in ascending order.

Terms

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