What is the largest divisor of 12345678987654321 other than itself?
12345678987654321除本身之外的最大约数是多少．
<gadget id="calculator">12_345_678_987_654_321 / 3</gadget>
<output>4_115_226_329_218_107</output>

<result>4_115_226_329_218_107</result>