#include <bits/stdc++.h>
#define int long long
using namespace std;
bool Check(int n)
{
    if (n <= 1) return false;
    int s = 1, k = sqrt(n);
    for (int i = 2; i <= k; i ++)
    {
        if (n % i == 0)
        {
            s += i;
            if (i != n / i) s += n / i;
        }
    }
    return s == n;
}
signed main()
{
    int n; cin >> n;
    cout << Check(n);
}

Chúc bn học tốt!

$\color{Turquoise}{\triangleright \triangleright\ \color{ Turquoise}{\text{ThienPhuc123} \triangleleft \triangleleft}}$

#include <iostream>
using namespace std;

bool isPerfect(int n) {
    int sum = 1;
    for (int i = 2; i <= n / 2; ++i) {
        if (n % i == 0) sum += i;
    }
    return sum == n && n != 1;
}

int main() {
    int n;
    cin >> n;
    cout << (isPerfect(n) ? 1 : 0) << endl;
    return 0;
}