Chapter 1 - Introduction to Algebraic Expressions - 1.2 The Commutative, Associative, and Distributive Laws - 1.2 Exercise Set - Page 17: 54

$u$ and $v$

We know that a product is composed of more than one number and/or variable being multiplied together. The factors of a product are the parts being multiplied together. Therefore, the factors of $uv$ (which is equal to $u\times v$) are $u$ and $v$.