As an example of the modifications I mentioned above, here is the same thing Nebulus200 did, but with some minor modifications that should result in a net speed gain.

Code:
#include <iostream.h>

int main(int argc, char **argv) {
        int number = 0;
        int altnum = 0;
        int total = 0;

        cout << "Please enter the number you wish to check for factors.\n";
        cin >> number;
        for (int i = 2; i < (number / 2); i++) {
                altnum = number / i;
                if (number % i == 0) {
                        cout << "Number " << i << " is a factor of " << number << ".\n";
                        cout << "Number " << altnum << " is a factor of " << number << "\n";
                        total += 2;
                }
        }
        if (! total) {
                cout << "Number " << number << " appears to be prime.\n";
        } else {
                cout << "Found " << total << " factors.\n";
        }
        return 0;
}
Just a simple rework of the code originally posted by nebulus200.