login
Multiply perfect numbers k for which the quotient sigma_3(k)/k = A001158(k)/k is nonintegral.
4

%I #11 May 09 2024 02:54:01

%S 28,2178540,45532800,142990848,14182439040,43861478400,518666803200,

%T 704575228896,13661860101120,181742883469056,740344994887680,

%U 20158185857531904,275502900594021408,71065075104190073088,87934476737668055040,154345556085770649600,1161492388333469337600

%N Multiply perfect numbers k for which the quotient sigma_3(k)/k = A001158(k)/k is nonintegral.

%H Amiram Eldar, <a href="/A088844/b088844.txt">Table of n, a(n) for n = 1..574</a>

%Y Cf. A007691, A001158, A066269.

%K nonn

%O 1,1

%A _Labos Elemer_, Nov 05 2003

%E More terms from _Amiram Eldar_, May 09 2024