id:A071189 - OEIS Search Results

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Smallest prime factor of sum of divisors of n.

+0
3

1, 3, 2, 7, 2, 2, 2, 3, 13, 2, 2, 2, 2, 2, 2, 31, 2, 3, 2, 2, 2, 2, 2, 2, 31, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 127, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 11, 2, 2, 2, 2, 2, 2, 2 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) = A020639(A000203(n)).`
	CROSSREFS	`Cf. A071190, A071187.` `Sequence in context: A010760 A085594 A085587 this_sequence A137822 A099378 A071190` `Adjacent sequences: A071186 A071187 A071188 this_sequence A071190 A071191 A071192`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 15 2002`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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