#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

#define REP(i, n) for (int i = 0; i < (n); i++)

const int MOD = 1e9 + 7;

struct mint {
    int n;
    mint(int n_ = 0) : n(n_) {}
};

mint operator+(mint a, mint b) { a.n += b.n; if (a.n >= MOD) a.n -= MOD; return a; }
mint operator-(mint a, mint b) { a.n -= b.n; if (a.n < 0) a.n += MOD; return a; }
mint operator*(mint a, mint b) { return (long long)a.n * b.n % MOD; }
mint &operator+=(mint &a, mint b) { return a = a + b; }
mint &operator-=(mint &a, mint b) { return a = a - b; }
mint &operator*=(mint &a, mint b) { return a = a * b; }

int phi[1000001];
mint F[1000001] = {1, 1};
mint R[1000001] = {1, 1};
mint I[1000001] = {0, 1};

vector<int> divs(int n) {
  vector<int> ans;
  for (int i = 1; i * i <= n; i++) {
    if (n % i == 0) {
      ans.push_back(i);
      if (i != n / i) ans.push_back(n / i);
    }
  }
  return ans;
}

int main() {
  for (int i = 2; i <= 1000000; i++) {
    I[i] = I[MOD % i] * (MOD - MOD / i);
    F[i] = F[i - 1] * i;
    R[i] = R[i - 1] * I[i];
  }
  for (int i = 0; i <= 1000000; i++) phi[i] = i;
  for (int i = 1; i <= 1000000; i++) for (int j = i * 2; j <= 1000000; j += i) phi[j] -= phi[i];
  int K;
  cin >> K;
  vector<int> C(K);
  int s = 0;
  REP(i, K) {
    cin >> C[i];
    s += C[i];
  }
  mint ans = 0;
  for (int d : divs(s)) {
    mint x = F[s / d];
    REP(i, K) {
      if (C[i] % d != 0) x = 0;
      else {
        x *= R[C[i] / d];
      }
    }
    ans += x * phi[d];
  }
  ans *= I[s];
  cout << ans.n << '\n';
}