38. (5 points)
Peter Pan is recently studying some new operational rules. It is defined that ※ $n$ represents the product of all non-zero even numbers not greater than $n$, and $\square n$ represents the smallest natural number that cannot divide $n$. For example: $※ 6=2 \times 4 \times 6=48$, $\square 10=3$. If $\square(※ x)=13$, then the smallest $x$ is $\qquad$ .
$22$