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A181598 Numbers m with divisor 8 | m and abundance sigma(m)-2*m = 8. 12
56, 368, 11096, 17816, 77744, 128768, 2087936, 2291936, 13174976, 35021696, 45335936, 381236216, 4856970752, 6800228816, 8589344768, 1461083549696, 1471763808896, 2199013818368 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(19) > 10^13. - Giovanni Resta, Apr 02 2014

LINKS

Table of n, a(n) for n=1..18.

FORMULA

A088833 INTERSECT A008590. [R. J. Mathar, Nov 04 2010]

PROG

(PARI) isok(n) = !(n % 8) && (sigma(n) - 2*n == 8); \\ Michel Marcus, Feb 08 2016

CROSSREFS

Cf. A097498, A181595, A181596, A181597, A118372, A045768, A000396, A005101, A153501, A005820.

Sequence in context: A296823 A003783 A088833 * A181705 A219826 A075283

Adjacent sequences:  A181595 A181596 A181597 * A181599 A181600 A181601

KEYWORD

nonn

AUTHOR

Vladimir Shevelev, Nov 01 2010

EXTENSIONS

Definition rephrased by R. J. Mathar, Nov 04 2010

a(16)-a(17) from Donovan Johnson, Dec 08 2011

a(18) from Giovanni Resta, Apr 02 2014

STATUS

approved

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Last modified January 15 12:14 EST 2021. Contains 340187 sequences. (Running on oeis4.)