Search: id:A054973
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%I A054973
%S A054973 1,0,1,1,0,1,1,1,0,0,0,2,1,1,1,0,0,2,0,1,0,0,0,3,0,0,0,1,0,1,2,2,0,0,0,
%T A054973 1,0,1,1,1,0,3,0,1,0,0,0,3,0,0,0,0,0,2,0,2,1,0,0,3,0,1,1,0,0,0,0,1,0,0,
%U A054973 0,5,0,1,0,0,0,1,0,2,0,0,0,3,0,0,0,0,0,3,1,0,1,0,0,4,0
%N A054973 Number of numbers whose divisors sum to n.
%H A054973 T. D. Noe, <a href="b054973.txt">Table of n, a(n) for n=1..10000</a>
%e A054973 a(12)=2 since 11 has factors 1 and 11 with 1+11=12 and 6 has factors 
               1, 2, 3 and 6 with 1+2+3+6=12
%Y A054973 Cf. A000203, A002191, A007609.
%Y A054973 Sequence in context: A111405 A089053 A068462 this_sequence A030351 A072617 
               A056226
%Y A054973 Adjacent sequences: A054970 A054971 A054972 this_sequence A054974 A054975 
               A054976
%K A054973 nonn
%O A054973 1,12
%A A054973 Henry Bottomley (se16(AT)btinternet.com), May 16 2000

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