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();

        for (int i = 2; num > 1;) {
            while (num % i == 0) {
                System.out.print(i + " ");
                num /= i;
            }
            if (i > num / i) {
                i = num;
            } else{
                i++;
            }
        }
    }
}