The natural number N has 45 positive divisors. What is the minimum value of N.
自然数N有45个正约数．N的最小值为多少．
<gadget id="calculator">2 ** 4</gadget>
<output>16</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">16 * 9 * 25</gadget>
<output>3_600</output>

<result>3_600</result>