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20的因数有哪几个

更新时间: 2020-10-27 00:00:00     

20的因数有以下六个:1,2,4,5,10,20。因为20=1×20=2×10=4×5。因数是指整数a除以整数b(b≠0)的商正好是整数而没有余数,我们就说b是a的因数。事实上因数一般定义在整数上:设A为整数,B为非零整数,若存在整数Q,使得A=QB,则称B是A的因数,记作B|A。但是也有的作者不要求B≠0。

关键词: 因数

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