Completely multiplicative function
= Completely multiplicative function
{wiki}
An arithmetic function $f$ is completely multiplicative when $f(mn)=f(m)f(n)$ for every pair of positive integers $m,n$, without a coprimality condition.
= Completely multiplicative function
{wiki}
An arithmetic function $f$ is completely multiplicative when $f(mn)=f(m)f(n)$ for every pair of positive integers $m,n$, without a coprimality condition.