If the six-digit \overline{abcabc} has exactly 18 factors, then \overline{abc}=how much.
若六位数\overline{abcabc}恰有18个因数，那么\overline{abc}=多少．
<gadget id="calculator">11 * 13</gadget>
<output>143</output>

<result>143</result>