Answer
$30=2\times3\times5$
Work Step by Step
$\ \ \ \ \ \ \ 30$
$\ \swarrow\ \ \searrow$
$2\ \ \ \ \ \ \ \ \ \ \ \ 15$
$\ \ \ \ \ \ \ \ \ \swarrow\ \ \searrow$
$\ \ \ \ \ \ \ \ 3\ \ \ \ \ \ \ \ \ \ \ \ 5$
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