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Odd and Even Values of Divisor Functions
The divisor function
is the sum of the
powers of the divisors of
, where
and
are positive integers;
is the number of divisors of
and
is the sum of the divisors of
.
, the sum of the proper divisors of
, is called the
aliquot sum
of
.
Contributed by:
Giovanna Roda
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Divisor Function
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MathWorld
)
Experimenting with the Ulam Spiral
(
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)
PERMANENT CITATION
"
Odd and Even Values of Divisor Functions
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/OddAndEvenValuesOfDivisorFunctions/
Contributed by:
Giovanna Roda
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