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A035322 Sum of composite divisors of n that are less than n and are not primes nor prime powers. +0
4
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 6, 0, 10, 0, 0, 0, 18, 0, 0, 0, 14, 0, 31, 0, 0, 0, 0, 0, 36, 0, 0, 0, 30, 0, 41, 0, 22, 15, 0, 0, 42, 0, 10, 0, 26, 0, 24, 0, 42, 0, 0, 0, 93, 0, 0, 21, 0, 0, 61, 0, 34, 0, 59, 0, 96, 0, 0, 15, 38, 0, 71, 0, 70, 0, 0, 0, 123, 0, 0, 0, 66, 0 (list; graph; listen)
OFFSET

1,12

MATHEMATICA

Table[ Plus @@ Select[ Divisors[ n ], (Length[ FactorInteger[ # ] ]>1 && #<n )& ], {n, 1, 100} ]

CROSSREFS

Cf. A000203, A035321, A023891, A060278.

Adjacent sequences: A035319 A035320 A035321 this_sequence A035323 A035324 A035325

Sequence in context: A102979 A102638 A005872 this_sequence A087936 A089804 A087255

KEYWORD

nonn

AUTHOR

njas

EXTENSIONS

Description corrected by Jack Brennen (jb(AT)brennen.net), Mar 28 2001

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.


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