Bi-unitary divisor
= Bi-unitary divisor
A divisor $d$ of $n$ is bi-unitary when the greatest common unitary divisor of $d$ and $n/d$ equals $1$. For $n=p^e$, all divisors are allowed except $p^{e/2}$ when $e$ is even.
= Bi-unitary divisor
A divisor $d$ of $n$ is bi-unitary when the greatest common unitary divisor of $d$ and $n/d$ equals $1$. For $n=p^e$, all divisors are allowed except $p^{e/2}$ when $e$ is even.