/*****************************************************************
    Author:lbn187, a konjac TwT
    Date:2016-4-9
    Contest:Codeforces
    Algorithm:QAQ
    ^_^  Orz hzh, NOI gold members, IOI 2016 world champion
    ^=^  Orz hhw, you are our blue moon, with you will live
    ^~^  Orz mxh, you are our red sun, without you we'll die
    ^-^  Orz yizhou, I wish you a successful marriage
    ^w^  Orz xianyangyu, you can sleep all the time in the game
*****************************************************************/
#pragma comment(linker, "/STACK:102400000,102400000")
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cstdlib>
#include<cmath>
#include<map>
#include<set>
#include<bitset>
#define sf scanf
#define pf printf
#define fo(i,n) for(int i=0;i<n;i++)
#define fr(i,n) for(int i=1;i<=n;i++)
#define dr(i,n) for(int i=n;i;i--)
#define do(i,n) for(int i=n-1;i>=0;i--)
#define rep(i,a,n) for(int i=a;i<=n;i++)
#define per(i,a,n) for(int i=n;i>=a;i--)
#define mjj(i,x) for(int i=fir[x];i;i=ne[i])
#define X first
#define Y second
#define Max(a,b) a=max(a,b)
#define Min(a,b) a=min(a,b)
#define mp make_pair
#define rlr son[son[root][1]][0] 
#define gi(a) sf("%d",&a);
#define gi2(a,b) sf("%d%d",&a,&b);
#define gi3(a,b,c) sf("%d%d%d",&a,&b,&c);
#define gl(a) sf("%I64d",&a);
#define gs(s) sf("%s",s);
#define pi(a) pf("%d\n",a);
#define pi2(a,b) pf("%d %d\n",a,b);
#define pl(a) pf("%I64d\n",a);
#define spr(x) (x*x)
#define pie acos(-1) 
#define CM(a,b) memcpy(a,b,sizeof(b))
#define CL(a) memset(a,0,sizeof(a))
#define N 322222
#define M 1000000007
#define inf 1e9
#define eps 1e-8
using namespace std;

typedef long long LL;typedef unsigned long long ULL;typedef double LF;typedef long double LD;
typedef pair<int,int>pii;typedef pair<int,LL>pil;typedef pair<LL,int>pli;typedef pair<LL,LL>pll;typedef pair<LF,LF>pff;
const int xx[]={1,-1,0,0},yy[]={0,0,1,-1};LL pow(LL a,LL b,LL p){LL sum=1;for(a%=p;b;a=a*a%p,b>>=1)if(b&1)sum=sum*a%p;return sum;}
char ch;void rd(int &x){for(ch=getchar();ch<'0';ch=getchar());for(x=0;ch>='0';ch=getchar())x=x*10+ch-'0';}
LL phi(LL n){LL i,re=n;for(i=2;i*i<=n;i++)if(n%i==0){re=re/i*(i-1);while(n%i==0)n/=i;}if(n>1)re=re/n*(n-1);return re%M;}
void exgcd(LL a,LL b,LL &x,LL &y){if(!b){x=1;y=0;return;}exgcd(b,a%b,y,x);y-=x*(a/b);}
LL gcd(LL a,LL b){return b==0?a:gcd(b,a%b);}

int T,n,m,o,x,y,e,k,t,i,j,tot,cnt,a[N],b[N],l[N],r[N],q[N];LL A,B,C,ans,s[N];
int main(){
    for(scanf("%d",&T);T--;){
        scanf("%d",&n);ans=0;e=0;
        fr(i,n)gi(b[i]);
        for(k=1;k<=n;k++){
            if((e+1)*(e+1)<=k)e++;
            for(o=0,i=k;i<=n;i+=k)a[++o]=b[i],s[o]=s[o-1]+a[o];
            for(i=1;i<=o;i++)l[i]=r[i]=0;
            for(q[t=0]=0,i=1;i<=o;q[++t]=i++){
                for(;t&&a[i]<=a[q[t]];t--);
                l[i]=q[t]+1;
            }
            for(q[t=0]=o+1,i=o;i;q[++t]=i--){
                for(;t&&a[i]<=a[q[t]];t--);
                r[i]=q[t]-1;
            }
            for(i=1;i<=o;i++)ans=max(ans,(s[r[i]]-s[l[i]-1])*a[i]*e);
        }
        printf("%I64d\n",ans);
    }
}