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请问这个公式是怎么得出来的啊?

Posted by 054100532 at 2008-07-01 15:22:39 on Problem 3604
In Reply To:Re:这题有解题报告没 Posted by:frkstyc at 2008-06-30 08:51:50 
> 
> Let the prime factorization of $N$ be
> 
> N=\prod_{i=1}^mp_i^{k_i},
> 
> the answer is
> 
> \left(\prod_{i=1}^m\binom{k_i+2}{2}\right)^2.
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