vrati vektor u kojem su samo slozeni brojevi

#include <iostream>
#include <vector>

std::vector<int> SamoSlozeni(std::vector<int> v)
{
    std::vector<int> rez;
    for(unsigned int i(0); i < v.size(); i++)
    {
        int counter(0);
        for(int j(1); j <= v.at(i); j++)
        {
            if(v.at(i) % j == 0)
                counter++;
        }
        if(counter > 2)
            rez.push_back(v.at(i));
    }
    return rez;
}

int main()
{
    std::vector<int> v1{7, 9, 2, 13, 23, 25, 17, 91};
    std::vector<int> v2 = SamoSlozeni(v1);
    for(unsigned int i(0); i < v2.size(); i++)
        std::cout << v2[i] << " ";
    return 0;
}