OFFSET
1,1
COMMENTS
Trivial divisors of a number are 1 and the number itself, see A048050.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
a(1) = 4 + 2 = 6;
a(2) = 6 + 5 = 11;
a(3) = 8 + 6 = 14.
MAPLE
MATHEMATICA
#+Total[Most[Rest[Divisors[#]]]]&/@Select[Range[4, 200], !PrimeQ[#]&] (* Harvey P. Dale, Oct 28 2013 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Juri-Stepan Gerasimov, Aug 06 2009
EXTENSIONS
a(4) corrected by R. J. Mathar, Aug 11 2009
STATUS
approved