#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000

struct combi{
	deque<mint> kaijou;
	deque<mint> kaijou_;
	
	combi(int n){
		kaijou.push_back(1);
		for(int i=1;i<=n;i++){
			kaijou.push_back(kaijou[i-1]*i);
		}
		
		mint b=kaijou[n].inv();
		
		kaijou_.push_front(b);
		for(int i=1;i<=n;i++){
			int k=n+1-i;
			kaijou_.push_front(kaijou_[0]*k);
		}
	}
	
	mint combination(int n,int r){
		if(r>n)return 0;
		mint a = kaijou[n]*kaijou_[r];
		a *= kaijou_[n-r];
		return a;
	}
	
	mint junretsu(int a,int b){
		mint x = kaijou_[a]*kaijou_[b];
		x *= kaijou[a+b];
		return x;
	}
	
	mint catalan(int n){
		return combination(2*n,n)/(n+1);
	}
	
};



int main(){
	
	int K;
	cin>>K;
	combi c(3000000);
	
	vector<int> C(K);
	int S = 0;
	mint ans = 0;
	int g = 0;
	rep(i,K){
		cin>>C[i];
		g = gcd(g,C[i]);
		S += C[i];
	}
	map<int,mint> mp;
	rep(i,S){
		int t = gcd(i,S);
		t = S/t;
		//cout<<i<<','<<t<<endl;
		if(g%t==0){
			if(mp.count(t))ans += mp[t];
			else{
				
				mint temp = 1;
				int s = 0;
				rep(j,K){
					temp *= c.combination(s+C[j]/t,C[j]/t);
					s += C[j]/t;
				}
				mp[t] = temp;
				ans += temp;
			}
		}
	}
	
	
	ans /= S;
	
	cout<<ans.val()<<endl;
	
	
	return 0;
}