fmpz_factor_euler_phi
Synopsis
#include <flint/fmpz_factor.h>void fmpz_factor_euler_phi(fmpz_t res, const fmpz_factor_t fac)sourceSets res to Euler's totient \varphi(n) = \prod p_i^{e_i - 1}(p_i - 1) of the integer whose factorisation into distinct primes is fac (the sign is ignored).
Cite this page
The FLINT team, “fmpz_factor_euler_phi (fmpz_factor.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/fmpz_factor/fmpz_factor_euler_phi.html (generated 2026-10-20).
@misc{flint-doc-fmpz-factor-fmpz-factor-euler-phi,
author = {{The FLINT team}},
title = {{fmpz\_factor\_euler\_phi (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_euler_phi.html},
note = {Generated 2026-10-20}
}