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In [1]: fact = 1 for N in range(1,101): fact *= N sum([int(x) for x in str(fact)])
fact = 1 for N in range(1,101): fact *= N sum([int(x) for x in str(fact)])
Out[1]: 648
648
In [2]: fact
fact
Out[2]: 93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000L
93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000L
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