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 y = 2;
        while(num != 1){
            if(num % y == 0){
                System.out.print(y+" ");
                num /= y;
            } else {
                if(y > Math.sqrt(num)){
                    System.out.print(num);
                    return;
                }
                y++;
            }
        }
    }
}