1000的因数有:1,2,4,5,8,10,20,25,40,50,100,125,200,250,500,1000共16个。
1000=2^3*5^3
所以他的因数有1,2,4,5,8,10,20,25,40,50,100,125,200,250,500,1000;共16个;
他的质因数只有2和5共两个。
1,2,4,5,8,10,20,25,40,50,100,125,200,250,500,1000
1,2,4,5,8,10,20,25,40,50,100,125,200,250,500,1000