Chapter 4 - Section 4.2 - Factors and Simplest Form - Exercise Set - Page 235: 15

$828=2^2\times3^2\times23$

$\ \ 828$ $\swarrow\searrow$ $2\ \ \ 414$ $\ \ \ \ \swarrow\searrow$ $\ \ \ \ 2\ \ \ \ \ \ \ 207$ $\ \ \ \ \ \ \ \ \ \ \swarrow\searrow$ $\ \ \ \ \ \ \ \ \ 3\ \ \ \ \ \ \ 69$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \swarrow\searrow$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3\ \ \ \ \ \ \ 23$