题解 | #质数因子#

import java.util.*;

// 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); 

        long input = in.nextLong();

        for(int i = 2; i <= Math.sqrt(input); i++){
            while(input % i == 0){
                System.out.print(i+" ");
                input = input/i;
            }
        }

        if(input != 1){
            System.out.print(input);
        }
        
        System.out.println();
    }
}