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A175989 Numbers with abundance 32. 6
572, 992, 7544, 10184, 28544, 83312, 113072, 122624, 382772, 507392, 537248, 698528, 791264, 1081568, 1279136, 2154584, 2279072, 5029184, 15126992, 29581424, 74899952, 89245784, 95327216, 307801856, 623799776, 712023296, 903230984, 1734487184, 9210347984 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(74) > 10^18. - Hiroaki Yamanouchi, Aug 23 2018

LINKS

Hiroaki Yamanouchi, Table of n, a(n) for n = 1..73 (first 47 terms from Giovanni Resta)

FORMULA

{n: A033880(n) = 32}.

MATHEMATICA

Select[Range[10000000], DivisorSigma[1, #]-2#==32&] (* Harvey P. Dale, Dec 10 2010 *)

PROG

(PARI) is(n)=sigma(n)==2*n+32 \\ Charles R Greathouse IV, Feb 21 2017

CROSSREFS

Cf. A005101, A141545-A141547, A181601.

Sequence in context: A178323 A049361 A252633 * A252640 A252641 A252632

Adjacent sequences: A175986 A175987 A175988 * A175990 A175991 A175992

KEYWORD

nonn

AUTHOR

R. J. Mathar, Nov 04 2010

EXTENSIONS

Additional terms provided by Harvey P. Dale, Dec 10 2010

a(19)-a(29) from Donovan Johnson, Dec 08 2011

STATUS

approved

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Last modified November 28 20:13 EST 2022. Contains 358421 sequences. (Running on oeis4.)