Answer
$828=2^2\times3^2\times23$
Work Step by Step
$\ \ 828$
$\swarrow\searrow$
$2\ \ \ 414$
$\ \ \ \ \swarrow\searrow$
$\ \ \ \ 2\ \ \ \ \ \ \ 207$
$\ \ \ \ \ \ \ \ \ \ \swarrow\searrow$
$\ \ \ \ \ \ \ \ \ 3\ \ \ \ \ \ \ 69$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \swarrow\searrow$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3\ \ \ \ \ \ \ 23$