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A069169 Nonprimes n such that sigma(n)*sum(d|n,1/sigma(d)) is an integer. 0
1, 6, 10, 14, 15, 18, 21, 22, 26, 28, 30, 33, 34, 35, 38, 39, 40, 42, 46, 51, 52, 55, 57, 58, 62, 65, 66, 69, 70, 74, 76, 77, 78, 82, 84, 85, 86, 87, 90, 91, 93, 94, 95, 102, 105, 106, 110, 111, 114, 115, 118, 119, 120, 122, 123, 124, 126, 129, 130, 133, 134, 138, 140 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..63.

CROSSREFS

Sequence in context: A143907 A132982 A300080 * A230766 A231877 A080364

Adjacent sequences:  A069166 A069167 A069168 * A069170 A069171 A069172

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Apr 09 2002

STATUS

approved

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Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)