Sequence to consider

[Ralf Stephan]

Some of the mentioned numbers were found in A059113:

%I A059113
%S A059113 31,187131,347529,658749,2106853,3969147,4657471,4980801,6540807,
%T A059113 10185273,20421219,25690413,42827421,44136183,51598911,73854183,
%U A059113 202765017,299457613,307464339,308953281,314858271,504081669,516979281
%N A059113 Sum of divisors of two distinct coprime squares.
%e A059113 31 = sigma(4^2) = sigma(5^2); 187131 = sigma(326^2) = sigma(407^2); etc.
%A A059113 David Wilson (davidwwilson(AT)comcast.net), Jan 04 2001


ralf