CountFactors

        /// <summary>
        /// Solution
        /// 100/100
        /// </summary>
        /// <param name="N"></param>
        /// <returns></returns>
        public int solution(int N)
        {
            int result = 0;
            int sqrtN = Convert.ToInt32(Math.Sqrt(N));

            for (int i = 1; i <= sqrtN; i++)
            {
                if (N % i == 0)
                    result++;
            }

            if (sqrtN * sqrtN == N)
                result = result * 2 - 1;
            else
                result = result * 2;
            return result;
        }