题解 | #质数因子#

import java.util.Scanner;

/*
如果一个数可以拆为a*b的形式，那么这个数一定大于等于a*a   (a<=b)
 */
public class Main {
    public static void main(String[] args) {
       Scanner in = new Scanner(System.in);
        int a = in.nextInt();
        for(int i=2; i*i<=a; i++){
            if(a%i == 0){
                System.out.print(i + " ");
                a = a/i;
                i-=1;
            }
        }
        if(a!=1){
            System.out.println(a);
        }
    }
}