A160321 Numbers n for which sigma(n)/n=k+2/3 with integer k.

84, 270, 1488, 1638, 24384, 35640, 199584, 2142720, 12999168, 100651008, 208565280, 240589440, 470564640, 3899750400, 6039429120, 25769607168, 36639203328, 53798734080, 231758392320, 314039721600, 412316073984, 5566503720960, 5967138078720, 302512616524800

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