//这里填你的代码^^
#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
inline LL solve()
{
    LL res = 0;
    int n;
    cin >> n;
    int p = 1;
    while (n / p)
    {
        int pr = n / (n / p);
        res += (pr - p + 1LL) * (n / p);
        p = pr + 1;
    }
    return res;
}
int main()
{
    int t = 1;
    cin >> t;
    for (int i = 1; i <= t; i ++ ) 
    printf("Case %d: %lld\n",i,solve());
    return 0;
}
//注意代码要放在两组三个点之间，才可以正确显示代码高亮哦~