id:A073181 - OEIS Search Results

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Sum of divisors of n which are not greater than the square-free kernel of n.

+0
4

1, 3, 4, 3, 6, 12, 8, 3, 4, 18, 12, 16, 14, 24, 24, 3, 18, 12, 20, 22, 32, 36, 24, 16, 6, 42, 4, 28, 30, 72, 32, 3, 48, 54, 48, 16, 38, 60, 56, 30, 42, 96, 44, 40, 33, 72, 48, 16, 8, 18, 72, 46, 54, 12, 72, 36, 80, 90, 60, 108, 62, 96, 41, 3, 84, 144, 68, 58, 96, 144, 72, 16, 74 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) >= A048250(n).`
	EXAMPLE	`The square-free kernel of 56=72^3 is 14=72 and the divisors <= 14 of 56 are {1, 2, 4, 7, 8, 14}, therefore a(56)=1+2+4+7+8+14=36.`
	CROSSREFS	`Cf. A000203, A073180, A073183.` `Sequence in context: A101684 A061800 A048250 this_sequence A046897 A109506 A000113` `Adjacent sequences: A073178 A073179 A073180 this_sequence A073182 A073183 A073184`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 19 2002`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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