Perfect Number

#include <iostream>

using namespace std;

bool Solution1(int num)
{
    int sum = 1;

    for (int i = 2; i < num; i++) {
        if (num % i == 0) {
            sum += i;
        }
    }

    return sum == num;
}

bool Solution2(int num)
{
    // Reference to <https://oeis.org/A000396>
    return num == 6 || num == 28 || num == 496 || num == 8128 || num == 33550336;
}

int main(int argc, char const* argv[])
{
    cout << Solution1(6) << endl;
    cout << Solution1(28) << endl;
    cout << Solution1(496) << endl;
    cout << Solution1(8128) << endl;

    cout << Solution1(7) << endl;
    cout << Solution1(1024) << endl;
    cout << Solution1(8184) << endl;

    return 0;
}