int nbDiviseurs3 (int a)
{
    int result = 2;
    int borne = 2;
    int i = 2;

    if (a%2 != 0)
        borne = 3;

    if (sqrt(a) == floor(sqrt(a)))
        result++;

    for (int i = 2; i*i < a; i++)
    {
        if (a%i == 0)
            result = result + 2;
    }
    return result;
}