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望楼主采纳~~！！
1到2020的质数和是多少
1-100以内的质数：
2,3,5,7,11,13,17,19,23,29，31,37.41,43,47,53，59，61,67,71,73,79,83,89,97。
1-100以内的合数：
4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48,49,
50,51,52,54,55,56,57,58,60,62,63,64,65,66,68,69,70,72,74,75,76,77,78,80,81,82,84,85,86,87,88,90,91，92,93,94,95,96,98,99。
合数
数学用语，指自然数中除了能被1和本身整除外，还能被其他的数整除的数。"0"“1”既不是质数也不是合数。
质数
质数（prime number）又称素数，有无限个。一个大于1的自然数，除了1和它本身外，不能整除以其他自然数（质数），换句话说就是该数除了1和它本身以外不再有其他的因数；否则称为合数。
1到2020的质数和是283081
扩展阅读：
质数(prime number)又称素数，有无限个。一个大于1的自然数，除了1和它本身外，不能被其他自然数整除，换句话说就是该数除了1和它本身以外不再有其他的因数;否则称为合数。
根据算术基本定理，每一个比1大的整数，要么本身是一个质数，要么可以写成一系列质数的乘积;而且如果不考虑这些质数在乘积中的顺序，那么写出来的形式是唯一的。最小的质数是2。
1到2020之间的质数一共306个。
评论列表（3条）
我是星鸣号的签约作者“若水伊人”
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