Among all the divisors of a positive integer, the number with the unit digit of 0, 1, 2, ..., 9 has appeared. What is the smallest such positive integer?
在一个正整数的所有约数中，个位数字为0，1，2，…，9的数都出现过，这样的正整数最小是多少？
<gadget id="calculator">2 * 2 * 2 * 3 * 3 * 5 * 7</gadget>
<output>2_520</output>

<result>2_520</result>