#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
vector<long long> segtree(vector<long long> &A){
	int N = 1;
	while (N < A.size()){
		N = N * 2;
	}
	vector<long long> ST(N * 2 - 1);
	for (int i = 0; i < A.size(); i++){
		ST[i + N - 1] = A[i];
	}
	for (int i = A.size() + N - 1; i < N * 2 - 1; i++){
		ST[i] = 0;
	}
	for (int i = N - 2; i >= 0; i--){
		ST[i] = __gcd(ST[i * 2 + 1], ST[i * 2 + 2]);
	}
	return ST;
}
long long segtree_query(vector<long long> &ST, int x, int y, int i, int L, int R){
	if (y <= L || R <= x){
		return 0;
	} else if (x <= L && R <= y){
		return ST[i];
	} else {
		int M = (L + R) / 2;
		long long A = segtree_query(ST, x, y, i * 2 + 1, L, M);
		long long B = segtree_query(ST, x, y, i * 2 + 2, M, R);
		return __gcd(A, B);
	}
}
int main(){
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int N;
  cin >> N;
  vector<long long> A(N);
  for (int i = 0; i < N; i++){
    cin >> A[i];
  }
  vector<long long> ST = segtree(A);
  if (ST[0] != 1){
    cout << 0 << endl;
  } else {
    int X = (ST.size() + 1) / 2;
    long long ans = 0;
    for (int i = 0; i < N; i++){
      if (segtree_query(ST, i, N, 0, 0, X) == 1){
        int tv = N + 1;
        int fv = i - 1;
        while (tv - fv > 1){
          int mv = (tv + fv) / 2;
          if (segtree_query(ST, i, mv + 1, 0, 0, X) == 1){
            tv = mv;
          } else {
            fv = mv;
          }
        }
        ans += N - tv;
      }
    }
    cout << ans << endl;
  }
}