Chapter 4 - Section 4.2 - Factors and Simplest Form - Exercise Set - Page 235: 16

$504=2^3\times3^2\times7$

$\ \ 504$ $\swarrow\searrow$ $2\ \ \ 252$ $\ \ \ \ \swarrow\searrow$ $\ \ \ \ 2\ \ \ \ \ \ \ 126$ $\ \ \ \ \ \ \ \ \ \ \swarrow\searrow$ $\ \ \ \ \ \ \ \ \ 2\ \ \ \ \ \ \ 63$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \swarrow\searrow$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3\ \ \ \ \ \ \ 21$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \swarrow\searrow$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3\ \ \ \ \ \ \ 7$