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2, 3, 6, 4, 9, 6, 14, 7, 12, 12, 9, 10, 21, 16, 18, 12, 30, 21, 20, 28, 15, 36, 16, 24, 27, 24, 19, 30, 28, 45, 21, 48, 22, 42, 39, 36, 24, 62, 36, 49, 27, 60, 36, 60, 40, 45, 30, 84, 31, 48, 52, 42, 72, 34, 63, 48, 72
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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Select[Table[DivisorSigma[1, n]/2, {n, 1, 70}], IntegerQ](* Ivan Neretin, May 09 2015 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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