id:A048753 - OEIS Search Results

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Composite n whose product of aliquot divisors divided by number of aliquot divisors is integral.

+0
2

4, 6, 15, 16, 20, 21, 27, 33, 36, 39, 42, 45, 48, 50, 51, 56, 57, 69, 70, 75, 87, 93, 100, 105, 111, 120, 123, 129, 132, 141, 154, 159, 162, 175, 177, 182, 183, 189, 196, 198, 201, 210, 213, 219, 220, 231, 237, 238, 245, 249, 256, 266, 267, 270, 273, 275, 291 (list; graph; listen)

	OFFSET	`4,1`
	EXAMPLE	`a(2)=6; for n=6 product of aliquot divisors is 321=6; 6/3, number of aliquot divisors = 2. Since 2 is integral, append 6 to sequence.`
	CROSSREFS	`A048752 and A048754.` `Sequence in context: A114058 A135093 A141667 this_sequence A055719 A117883 A106387` `Adjacent sequences: A048750 A048751 A048752 this_sequence A048754 A048755 A048756`
	KEYWORD	`easy,nonn`
	AUTHOR	`Enoch Haga (Enokh(AT)comcast.net)`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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