mutually coprime

Natural numbers $a_1,a_2,\mathrm{\dots },a_n$ are called mutually coprime if there is no $p\in \mathbb{N}$, $p>1$ with $p|a_i$ for all $i\le n$. By this definition for example $15$, $21$ and $25$ would be mutually coprime though they are not pairwise coprime, because that would that each pair of these numbers is coprime.