C加加编程找出n以内的所有完数

以下是C++编程找出n以内的所有完数的代码：

#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++) {
        int sum = 0;
        for (int j = 1; j < i; j++) {
            if (i % j == 0) {
                sum += j;
            }
        }
        if (sum == i) {
            cout << i << " its factors are ";
            for (int j = 1; j < i; j++) {
                if (i % j == 0) {
                    cout << j << " ";
                }
            }
            cout << endl;
        }
    }
    return 0;
}