题解 | 质数因子

import java.io.IOException;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws IOException {
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) {
            int n = in.nextInt();
            System.out.println(getPrimerDivisors(n));
        }
        in.close();
    }

    private static String getPrimerDivisors(int n) {

        StringBuilder sb = new StringBuilder();
        while (n != 1) {
            for (int i = 2; i <= n; i++) {
                if (n % i == 0) {
                    n /= i;
                    sb.append(i).append(" ");
                    break;
                }
            }

        }
        return sb.toString();
    }
}