Question 1 Peculiar Number Java Solution

import java.util.*;

public class Pecnum {
    public static void main(String[] args) {
        Scanner sc =  new Scanner(System.in);
        int t = sc.nextInt();

        while (t-- > 0) {
            int a = sc.nextInt(), n = sc.nextInt();
            long num = (long) Math.pow(a, n);
            int sum = 0;
            while (num > 0) {
                sum += num % 10;
                num = num / 10;
            }
            System.out.println(sum);
        }
        sc.close();
    }
}