[seqfan] Re: A Gaussian-integer analog of the sum-of-divisors function

Richard J. Mathar mathar at mpia-hd.mpg.de
Thu Apr 28 11:11:52 CEST 2022

aw> From: Allan Wechsler <acwacw at gmail.com>
aw> To: seqfan at list.seqfan.eu
aw> Subject: [seqfan] A Gaussian-integer analog of the sum-of-divisors
aw>         function
aw> ...
aw> My choice was to add up the divisors that are the products of powers of
aw> "positivish" Gaussian primes. "Positivish" means that the real part is
aw> positive, and the imaginary part doesn't exceed the real part.

A similar rule of collecting Gaussian integer representatives
with factors in the first octant of the imaginary
plane is used in https://en.wikipedia.org/wiki/Table_of_Gaussian_integer_factorizations 

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