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Program.cs
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Program.cs
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using System;
namespace FourDivisors
{
class Program
{
static void Main(string[] args)
{
int[] nums = {2401};
Console.WriteLine(SumFourDivisors(nums));
}
static int SumFourDivisors(int[] nums)
{
int sum = 0;
foreach (var num in nums)
sum += GetDvisorSum(num);
return sum;
}
static int GetDvisorSum(int num)
{
int sum = num + 1;
int count = 2;
for (int i = 2; i <= Math.Sqrt(num); i++)
{
if (num % i == 0)
{
if (i == num / i)
{
sum += i;
count += 1;
}
else
{
sum += num / i + i;
count += 2;
}
}
if (count > 4)
return 0;
}
if(count == 4)
return sum;
return 0;
}
}
}