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标题: GWD-1-31 [打印本页]

作者: hahawe 时间: 2010-7-2 14:47 标题: GWD-1-31

A positive integer n is said to be “prime-saturated” if the product of all the different positive prime factors of n is less than the square root of n. What is the greatest two-digit prime-saturated integer?

99
98
97
96
95
这题就没有思路了

作者: 布丁奶茶 时间: 2010-7-2 17:07

你要把答案做因式分解~然后找出因数为质数~相乘小於答案开根号的

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