A140635 - OEIS

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A140635

Smallest positive integer having the same number of divisors as n.

1, 2, 2, 4, 2, 6, 2, 6, 4, 6, 2, 12, 2, 6, 6, 16, 2, 12, 2, 12, 6, 6, 2, 24, 4, 6, 6, 12, 2, 24, 2, 12, 6, 6, 6, 36, 2, 6, 6, 24, 2, 24, 2, 12, 12, 6, 2, 48, 4, 12, 6, 12, 2, 24, 6, 24, 6, 6, 2, 60, 2, 6, 12, 64, 6, 24, 2, 12, 6, 24, 2, 60, 2, 6, 12, 12, 6, 24, 2, 48, 16, 6, 2, 60, 6, 6, 6, 24, 2 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`a(n)<=n for all n. Moreover, a(n)=n if and only if n belongs to A005179.`
	LINKS	`Table of n, a(n) for n=1..89.`
	FORMULA	`a(n) = A005179(A000005(n))`
	CROSSREFS	`Cf. A000005, A005179, A139770.` `Cf. A019505, A138113, A061300 (sequences that can be defined in terms of this sequence).` `Sequence in context: A073348 A122457 A139770 * A002322 A127835 A117004` `Adjacent sequences: A140632 A140633 A140634 * A140636 A140637 A140638`
	KEYWORD	`nonn`
	AUTHOR	`Max Alekseyev, May 19 2008`
	STATUS	`approved`

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Last modified September 11 13:51 EDT 2015. Contains 261536 sequences.