Question

Express 23150 as product of its prime factors. Is it unique?

Answer 1

Prime factors of $23150=2\times 5\times 5\times 463.$
$\begin{array}{cc}2& 23150\\ 5& 11575\\ 5& 2315\\ 463& 463\\ & 1\end{array}$
As per the fundamental theorem of Arithmetic every number has a unique factorisation. Hence it's unique.