SPOJ.com - Problem DIVSUM

Why does my code wrong ??? https://www.spoj.com/problems/DIVSUM/4

#include
#include<math.h>
using namespace std;

void USCLN()
{
long long num,res = 0;
cin >> num;
for (int i = 2; i <= sqrt(num); i++)
{
if (num % i == 0)
{
if (i == (num / i))
res += i;
else
res += (i + (num / i));
}
}
cout << res +1 << endl;
}

int main()
{
int t,n;
cin >> t;
while (t–)
{
USCLN();
}
return 0;
}