id:A023888 - OEIS Search Results

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Sum of prime power divisors of n (1 included).

+0
2

1, 3, 4, 7, 6, 6, 8, 15, 13, 8, 12, 10, 14, 10, 9, 31, 18, 15, 20, 12, 11, 14, 24, 18, 31, 16, 40, 14, 30, 11, 32, 63, 15, 20, 13, 19, 38, 22, 17, 20, 42, 13, 44, 18, 18, 26, 48, 34, 57, 33, 21, 20, 54, 42, 17, 22, 23, 32, 60, 15, 62, 34, 20, 127, 19, 17, 68, 24, 27 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`Array[ Plus @@ (Select[ Divisors[ # ], (Length[ FactorInteger[ # ] ]<=1)& ])&, 70 ]`
	CROSSREFS	`Sequence in context: A105852 A067342 A105827 this_sequence A117553 A120224 A132009` `Adjacent sequences: A023885 A023886 A023887 this_sequence A023889 A023890 A023891`
	KEYWORD	`nonn`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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