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标题: 质因子 [打印本页]

作者: lingdang1988 时间: 2005-10-26 19:54 标题: 质因子

这是一月份的JJ,

5. 5^40 + 5^37 有几个质因子？　the answer is 4.

答案是怎么就出来的？　谁能告诉我质因子是什么意思吗？我一遇到因子或质因子的题就头晕．　Can anyone help me to solve
this kind of problem? Is there any easy way for me to solve, and I
won't be afraid of this type of questions in the future?

作者: himba 时间: 2005-10-27 06:41

5^37(5^3+1)=5^37*126=5^37*2*7*9

so,质因子有2,5,7,9

思路也就是化成质数乘积

作者: applebees 时间: 2005-10-31 21:32

ding !!!!!!!!

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