Answer
$3^2\times5\times7$
Work Step by Step
$\ \ 315$
$\swarrow\searrow$
$3\ \ \ \ 105$
$\ \ \ \ \swarrow\searrow$
$\ \ \ 3\ \ \ \ \ \ \ 35$
$\ \ \ \ \ \ \ \ \ \swarrow\searrow$
$\ \ \ \ \ \ \ \ \ \ 5\ \ \ \ \ 7$
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