id:A086921 - OEIS Search Results

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Least number with at least n divisors that are at most its square root.

+0
5

1, 4, 12, 24, 36, 60, 120, 120, 180, 240, 360, 360, 720, 720, 720, 840, 1260, 1260, 1680, 1680, 2520, 2520, 2520, 2520, 5040, 5040, 5040, 5040, 5040, 5040, 7560, 7560, 10080, 10080, 10080, 10080, 15120, 15120, 15120, 15120, 20160, 20160, 25200, 25200 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Smallest number m such that can write m = p*q (with p <= q) in at least n ways.`
	FORMULA	`a(n) = A061799(2n-1). - David Wasserman (wasserma(AT)spawar.navy.mil), Apr 12 2005`
	CROSSREFS	`Cf. A038548, A038549, A004778.` `Cf. A118224.` `Sequence in context: A033602 A008122 A008103 this_sequence A004778 A038549 A008081` `Adjacent sequences: A086918 A086919 A086920 this_sequence A086922 A086923 A086924`
	KEYWORD	`easy,nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Sep 19 2003`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)eunet.rs) and Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 20 2003`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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