一个正整数
,若不含大于1的完全平方数因子,则称
为“单纯数”.那么,在
这1000个数中,单纯数共有________ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5718257038bdc4e21e6ca2a0e5706686.png)
2019高三·全国·竞赛 查看更多[1]
更新时间:2018-12-27 18:02:40
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