id:A153501 - OEIS Search Results

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Abundant numbers n such that n/(sigma(n)-2n) is an integer.

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12, 18, 20, 24, 40, 56, 88, 104, 120, 196, 224, 234, 368, 464, 650, 672, 992, 1504, 1888, 1952, 3724, 5624, 9112, 11096, 13736, 15376, 15872, 16256, 17816, 24448, 28544, 30592, 32128, 77744, 98048, 122624, 128768, 130304, 174592, 396896, 507392 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Sigma(n)-2n is the abundance of n. The only odd term in this sequence < 4*10^10 is 173369889.`
	EXAMPLE	`The abundance of 174592 = sigma(174592)-2*174592 = 43648. 174592/43648 = 4.`
	CROSSREFS	`Cf. A000203, A005101, A033880.` `Sequence in context: A005101 A124626 A087245 this_sequence A030515 A162947 A070011` `Adjacent sequences: A153498 A153499 A153500 this_sequence A153502 A153503 A153504`
	KEYWORD	`nonn`
	AUTHOR	`Donovan Johnson (donovan.johnson(AT)yahoo.com), Jan 02 2009`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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