Sum of digits of all the divisors of n.

Terms

a(0) =1a(1) =3a(2) =4a(3) =7a(4) =6a(5) =12a(6) =8a(7) =15a(8) =13a(9) =9a(10) =3a(11) =19a(12) =5a(13) =15a(14) =15a(15) =22a(16) =9a(17) =30a(18) =11a(19) =15a(20) =14a(21) =9a(22) =6a(23) =33a(24) =13a(25) =15a(26) =22a(27) =29a(28) =12a(29) =27