CountFactors

 1         /// <summary>
 2         /// Solution
 3         /// 通过率 100%
 4         /// </summary>
 5         /// <param name="N"></param>
 6         /// <returns></returns>
 7         public int solution(int N)
 8         {
 9             int result = 0;
10             int sqrtN = Convert.ToInt32(Math.Sqrt(N));
11 
12             for (int i = 1; i <= sqrtN; i++)
13             {
14                 if (N % i == 0)
15                     result++;
16             }
17 
18             if (sqrtN * sqrtN == N)
19                 result = result * 2 - 1;
20             else
21                 result = result * 2;
22             return result;
23         }