求正整数n之内的所有完数及其因子的c++代码

以下是求解正整数n以内所有完数及其因子的C++代码：

#include <iostream>
#include <vector>

using namespace std;

vector<int> getFactors(int num) {
    vector<int> factors;
    for (int i = 1; i < num; i++) {
        if (num % i == 0) {
            factors.push_back(i);
        }
    }
    return factors;
}

int main() {
    int n;
    cout << "请输入正整数n: ";
    cin >> n;
    for (int i = 1; i <= n; i++) {
        int sum = 0;
        vector<int> factors = getFactors(i);
        for (int j = 0; j < factors.size(); j++) {
            sum += factors[j];
        }
        if (sum == i) {
            cout << i << "是一个完数，因子为：";
            for (int j = 0; j < factors.size(); j++) {
                cout << factors[j] << " ";
            }
            cout << endl;
        }
    }
    return 0;
}

运行程序，输入一个正整数n，即可输出n以内的所有完数及其因子。