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A091570 Sum of odd proper divisors of n. Sum of the odd divisors of n that are less than n. 1
0, 1, 1, 1, 1, 4, 1, 1, 4, 6, 1, 4, 1, 8, 9, 1, 1, 13, 1, 6, 11, 12, 1, 4, 6, 14, 13, 8, 1, 24, 1, 1, 15, 18, 13, 13, 1, 20, 17, 6, 1, 32, 1, 12, 33, 24, 1, 4, 8, 31, 21, 14, 1, 40, 17, 8, 23, 30, 1, 24, 1, 32, 41, 1, 19, 48, 1, 18, 27, 48, 1, 13, 1, 38, 49 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..75.

EXAMPLE

E.g. the sum of odd divisors of 9 that are less than 9 is 4=1+3.

CROSSREFS

Cf. A000593.

Sequence in context: A222360 A222371 A222479 * A116669 A016523 A026998

Adjacent sequences:  A091567 A091568 A091569 * A091571 A091572 A091573

KEYWORD

easy,nonn

AUTHOR

Mohammad K. Azarian, Mar 04 2004

STATUS

approved

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Last modified May 26 04:23 EDT 2013. Contains 225653 sequences.