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 A160321 Numbers n for which sigma(n)/n=k+2/3 with integer k. 9
 84, 270, 1488, 1638, 24384, 35640, 199584, 2142720, 12999168, 100651008, 208565280, 240589440, 470564640, 3899750400, 6039429120, 25769607168, 36639203328, 53798734080, 231758392320, 314039721600, 412316073984, 5566503720960, 5967138078720, 302512616524800 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..24. EXAMPLE 84 is in the sequence because sigma(84)/84=224/84=2+2/3 270 is in the sequence because sigma(270)/270=720/270=2+2/3 CROSSREFS Cf. A160320 (sigma(n)/n=k+1/3), A159907 (sigma(n)/n=k+1/2). Sequence in context: A220043 A137210 A220009 * A249969 A306516 A131072 Adjacent sequences: A160318 A160319 A160320 * A160322 A160323 A160324 KEYWORD nonn AUTHOR J.C.Klein (hklein(AT)planet.nl), May 08 2009 EXTENSIONS a(10)-a(18) from Donovan Johnson, May 26 2009 a(19)-a(24) from Michel Marcus, Sep 21 2012 STATUS approved

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Last modified August 15 08:18 EDT 2024. Contains 375173 sequences. (Running on oeis4.)