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Search: id:A123524
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| A123524 |
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Smallest odd number k such that sigma(x)=k has at least n solutions. |
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+0
2
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| 1, 31, 347529, 10773399, 4104665019, 28732655133, 28732655133, 35492068813383
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Note that sigma(x) is odd iff x is in A028982 (numbers of the form m^2 or 2m^2 for m>0).
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EXAMPLE
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For n=3, sigma(x)=347529 has solutions x = 164836, 203522, 239121.
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CROSSREFS
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Different from A123523.
Sequence in context: A107122 A059113 A057839 this_sequence A123523 A079595 A051155
Adjacent sequences: A123521 A123522 A123523 this_sequence A123525 A123526 A123527
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KEYWORD
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more,nonn
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AUTHOR
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T. D. Noe (noe(AT)sspectra.com), Oct 02 2006
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EXTENSIONS
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35492068813383 from Martin Fuller (martin_n_fuller(AT)btinternet.com), Oct 07 2006
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