Search: id:A074400
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%I A074400
%S A074400 2,6,8,14,12,24,16,30,26,36,24,56,28,48,48,62,36,78,40,84,64,72,48,120,
%T A074400 62,84,80,112,60,144,64,126,96,108,96,182,76,120,112,180,84,192,88,168,
%U A074400 156,144,96,248,114,186,144,196,108,240,144,240,160,180,120,336,124,192
%N A074400 Sum of the even divisors of 2n.
%F A074400 2*sigma(n)
%e A074400 The even divisors of 12 are 12, 6, 4, 2, which sum to 24, so a(6) = 24.
%p A074400 with(numtheory): seq(2*sigma(n),n=1..65);
%Y A074400 2*A000203(n).
%Y A074400 Sequence in context: A002511 A074383 A107505 this_sequence A165607 A109440 
               A063242
%Y A074400 Adjacent sequences: A074397 A074398 A074399 this_sequence A074401 A074402 
               A074403
%K A074400 easy,nonn
%O A074400 1,1
%A A074400 Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Nov 25 2002
%E A074400 More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), May 24 2004

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