#include <iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    int arr[n];
    for (int i = 0; i < n; i++)
        cin >> arr[i];

    int cnt = 0;
    for (int i = 0; i < n; i++)
    {
        for (int j = i + 1; j < n; j++)
        {
            if (arr[i] * arr[j] % (arr[i] + arr[j]) == 0)
            {
                cnt++;
            }
        }
    }
    cout << cnt << endl;
    return 0;
}