There is a four-digit number less than 2000, which has exactly 14 factors, and the last digit of a prime factor is 1. Find this four-digit number.
有一个小于2000的四位数，它恰好含有14个因数，其中有一个质因数的末位数字是1，求这个四位数．
<gadget id="calculator">2 ** 6</gadget>
<output>64</output>

<gadget id="calculator">64 * 31</gadget>
<output>1_984</output>

<result>1_984</result>