题解 | #质数因子#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        int index=2;

        while(index <= Math.sqrt(num)){
            if(num % index==0){
                num = num/index;
                System.out.printf("%d ",index);
            }else{
                index++;
            }
        }
         System.out.printf("%d ",num);
      }
 
}