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四十的因数中三的倍数有多少个
更新时间: 2020-10-31 00:00:00  

四十的因数中,没有三的倍数。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,就说b是a的因数。两个正整数相乘,那么这两个数都叫做积的因数。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。但是也有的不要求B≠0。

关键词: 因数 倍数 多少

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