题解 | 质数因子

#include <iostream>
#include <vector>
using namespace std;

const int kMax = 2000000014;
int main() {
    int n;
    cin >> n;
    if (n >=2 && n <= kMax)
    {
        for (int i = 2; i * i <= n; ++i)
        {
            while (n % i == 0) {
                cout << i << " ";
                n /= i;            
            }
        }
        if (n >= 2) {
            cout << n;
        }
        
        cout << endl;
    }
}