There is a natural number, the sum of its smallest two divisors is 4, and the sum of its largest two divisors is 100. Find this natural number.
有一个自然数，它的最小的两个约数之和是4，最大的两个约数之和是100，求这个自然数．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">100 - 25</gadget>
<output>75</output>

<result>75</result>