fmpz_factor_divisor_sigma
Synopsis
#include <flint/fmpz_factor.h>void fmpz_factor_divisor_sigma(fmpz_t res, ulong k, const fmpz_factor_t fac)sourceSets res to \sigma_k(n) = \sum_{d \mid n} d^k = \prod_i (p_i^{k(e_i + 1)} - 1)/(p_i^k - 1) (the number of divisors for k = 0).
Cite this page
The FLINT team, “fmpz_factor_divisor_sigma (fmpz_factor.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/fmpz_factor/fmpz_factor_divisor_sigma.html (generated 2026-10-20).
@misc{flint-doc-fmpz-factor-fmpz-factor-divisor-sigma,
author = {{The FLINT team}},
title = {{fmpz\_factor\_divisor\_sigma (fmpz\_factor.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/fmpz_factor/fmpz_factor_divisor_sigma.html},
note = {Generated 2026-10-20}
}