If n is the product of the integers from 1 to 20 inclusive, what is the greatest integer k for which 2k is a factor of n?
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Product of 1 - 20 inclusive. 1-20的乘积,20!; 2(k) is a factor of, 就是20!因子,是多少个2 把双数挑出来,看2有多少个。
Product of 1 - 20 inclusive. 1-20的乘积,20!;
2(k) is a factor of, 就是20!因子,是多少个2
把双数挑出来,看2有多少个。
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