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Search: id:A082955
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| A082955 |
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Numbers n such that sigma(n*phi(n))=sigma(n)^2. |
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+0
1
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| 1, 87, 1257, 42921, 65307, 68037, 89067, 112803, 116619, 186231, 252417, 350283, 356259, 380559, 435993, 477723, 492771, 527781, 635259, 672051, 708111, 866379, 991479, 1062723, 1078509, 1347699, 1352199, 1353873, 1449363, 1561431, 1838019
(list; graph; listen)
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OFFSET
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1,2
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PROGRAM
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(PARI) for(n=1, 2000000, if(sigma(n*eulerphi(n))==sigma(n)^2, print1(n, ", ")))
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CROSSREFS
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Sequence in context: A061625 A128956 A093287 this_sequence A116269 A017803 A017750
Adjacent sequences: A082952 A082953 A082954 this_sequence A082956 A082957 A082958
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KEYWORD
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nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), May 26 2003
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EXTENSIONS
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More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 05 2003
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