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不到6000个数,搜一下,全部算出来就可以了.

Posted by xfxyjwf at 2005-08-08 11:03:53 on Problem 2247
In Reply To:关于这题的一点想法： Posted by:lbp at 2005-08-08 10:25:39 
2^a*3^b*5^c*7^d,把所有小于2*10^?的数都记录下来就好了.
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