id:A069235 - OEIS Search Results

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Numbers n, not perfect squares, such that the square-free part of n divides sigma(n).

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6, 24, 28, 40, 54, 96, 117, 120, 135, 147, 150, 216, 224, 234, 252, 270, 294, 360, 384, 468, 486, 496, 507, 540, 588, 600, 640, 672, 700, 726, 775, 819, 847, 864, 891, 931, 936, 1000, 1014, 1080, 1083, 1176, 1323, 1350, 1372, 1536, 1550, 1638, 1694, 1734 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`54 is not a square, sigma(54)=120, 6 is the square-free part of 54, and 6 divides 120. Hence a(5)=54 is in the sequence.`
	CROSSREFS	`Adjacent sequences: A069232 A069233 A069234 this_sequence A069236 A069237 A069238` `Sequence in context: A049319 A140347 A072710 this_sequence A118372 A064510 A114274`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 13 2002`

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Last modified October 12 13:44 EDT 2008. Contains 144830 sequences.

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