[프로그래머스] 약수의 합 --java

https://school.programmers.co.kr/learn/courses/30/lessons/12928

프로그래머스

문제)정수 n을 입력받아 n의 약수를 모두 더한 값을 리턴하는 함수, solution을 완성해주세요.

 

 

 

 

 

풀이)

import java.util.ArrayList;
import java.util.Scanner;

class Solution {
    public int solution(int n) {
        int answer = 0;
        ArrayList<Integer> list = new ArrayList<>();
        if(n!=0){
            list.add(1);
            for(int i=2; i<=n; i++){
                if(n%i==0){
                    list.add(i);
                }
            }
        }
        

        for(int i=0; i<list.size(); i++){
            answer += list.get(i);
        }
        return answer;
    }

    public static void main(String[] args){
        Solution T = new Solution();
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        System.out.println(T.solution(n));
    }
}