/// <summary>
/// <paramref name="n"/> の約数を返します。
/// </summary>
public static long[] Divisor(long n)
{
if (n == 1)
{
return new long[] { 1 }
}
;
var left = new SimpleList <long>();
var right = new SimpleList <long>();
left.Add(1);
right.Add(n);
for (long i = 2, d = Math.DivRem(n, i, out long amari);
i <= d;
i++, d = Math.DivRem(n, i, out amari))
{
if (amari == 0)
{
left.Add(i);
if (i != d)
{
right.Add(d);
}
}
}
right.Reverse();
var res = new long[left.Count + right.Count];
left.CopyTo(res, 0);
right.CopyTo(res, left.Count);
return(res);
}
public SimpleList<int> GetIndexes()
{
var current = this;
var indexes = new SimpleList<int>();
while (current != null)
{
indexes.Add(current.Index);
current = current.Parent;
}
indexes.Reverse();
return indexes;
}
} //EndMethod
public IEnumerable <int> SimpleListReverse()
{
return(SimpleListItems.Reverse());
} //EndMethod
