%I #10 May 04 2024 13:33:59
%S 248,357,1045,3596,3956,4064,5396,8636,20026,20320,23374,24871,25714,
%T 29029,33915,35074,39585,41656,50065,55154,56134,56536,58435,61344,
%U 64285,74613,79000,87087,87685,137885,140335,142240
%N Numbers k such that sigma(k) = phi(k*bigomega(k)).
%C Comment from Giovanni Resta, Nov 15 2006: For all the numbers listed, gcd(n!-1,2^n+1) = 2n+1. Is this always true? Reply from Max Alekseyev, Nov 16 2006: This is plausible and true for n up to 45000.
%K easy,nonn
%O 1,1
%A _Benoit Cloitre_, Mar 02 2002