HJ6质数因子

 1 import java.util.Scanner;
 2 
 3 /**
 4  * @author: yekai  <br/>
 5  * Date: 2021/11/15:21:28  <br/>
 6  * Description:HJ6质数因子
 7  * 给出一个数，求他的质数因子
 8  */
 9 public class HJ6 {
10     public static void main(String[] args) {
11         Scanner sc = new Scanner(System.in);
12         //定义一个long数
13         long a = sc.nextLong();
14         long k = (long)Math.sqrt(a);
15         for(long i = 2;i<= k;i++) {
16             while (a % i == 0){
17                 System.out.print(i + " ");
18                 a /= i;
19             }
20 
21         }
22         //没有这句话的话会导致测试用例一个不通过
23         System.out.println(a == 1 ? "": a+" ");
24     }
25 }