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);
        // 注意 hasNext 和 hasNextLine 的区别
        int a = in.nextInt();
        double b = Math.pow(a, 0.5);
        for(int i = 2; i<= b; i++){
            while(a%i == 0){
                System.out.print(i + " ");
                a = a/i;
            }
        }
        if(a > 2){
            System.out.print(a + " ");
        }
    }
}