public void Solve()
{
int i = 4;
List<Amicable> sums = new List<Amicable>();
while (i < 10000)
{
var result = new Amicable();
result.number = i;
for (int y = 1; y <= Math.Sqrt(i); y++)
{
if ((i % y) == 0)
{
result.product.Add(y);
if (y != 1)
result.product.Add(i / y);
}
}
sums.Add(result);
i++;
}
foreach (var item in sums)
{
if (item.sum < 10000)
{
checkIfAmicable(sums, item);
}
}
List<Amicable> myResults = sums.Where(x => x.isAmicable).ToList();
Console.WriteLine("Solution for problem 21: {0}", myResults.Sum(x => x.number));
}
private void checkIfAmicable(List<Amicable> myList, Amicable value)
{
var y = myList.SingleOrDefault(x => (x.number == value.sum && x.number != x.sum));
if (y != null)
value.isAmicable = (y.number == value.sum && value.number == y.sum);
}
