#include <iostream>
using namespace std;

bool countdiv500(int x);

int main()
{
	for(int i = 1; ;i++)
	{
		int tn = (i * (i + 1)) / 2;
		cout << "\n" << tn << " -- " << i;
		if(countdiv500(tn))
		{
			cout << "\nRequired number: " << tn;
			break;
		}
	}
	cout << "\n";
	return 0;
}

bool countdiv500(int x)
{
	int count = 0, i = 1;
	while(i != x)
	{
		if(x % i == 0)
		{
			count++;
		}
		
		if(count == 500)
		{
			return 1;
			break;
		}
		i++;
	}
	
	return 0;
}