id:A146747 - OEIS Search Results

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Numbers n such that sigma_1(n)*sigma_0(n)/(sigma_1(n)-sigma_0(n))=c, c an integer.

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2, 3, 5, 6, 7, 20, 30 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A000203(n)*A000005(n)/(A000203(n)-A000005(n)) = c, c an integer.`
	CROSSREFS	`Cf. A083795, A063647, A000203, A000005` `Sequence in context: A073721 A090745 A002229 this_sequence A077674 A067077 A067183` `Adjacent sequences: A146744 A146745 A146746 this_sequence A146748 A146749 A146750`
	KEYWORD	`easy,nonn`
	AUTHOR	`Ctibor O. Zizka (c.zizka(AT)email.cz), Nov 01 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.