#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> P;
typedef pair<int,int> Pi;
#define rep(i,n) for(ll i=0;i<n;i++)
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define fi first
#define se second
#define endl "\n"

template<typename T> inline bool chmax(T &a, T b){if(a<b){a=b;return true;}return false;}
template<typename T> inline bool chmin(T &a, T b){if(a>b){a=b;return true;}return false;}
template<typename T> ostream& operator<<(ostream& s,const complex<T>& d) {return s<<"("<<d.real()<<", "<<d.imag()<< ")";}
template<typename T1, typename T2> ostream& operator<<(ostream& s,const pair<T1,T2>& d) {return s<<"("<<d.first<<", "<<d.second<<")";}
template<typename T> ostream& operator<<(ostream& s, const vector<T>& d){int len=d.size();rep(i,len){s<<d[i];if(i<len-1) s<<" ";}return s;}
template<typename T> ostream& operator<<(ostream& s,const vector<vector<T>>& d){int len=d.size();rep(i,len){s<<d[i]<<endl;}return s;}
template<typename T> ostream& operator<<(ostream& s,const set<T>& v){s<<"{ ";for(auto itr=v.begin();itr!=v.end();++itr) {if (itr!=v.begin()) {s<< ", ";}s<<(*itr);}s<<" }";return s;}
template<typename T1, typename T2> ostream& operator<<(ostream& s,const map<T1,T2>& m){s<<"{"<<endl;for(auto itr=m.begin();itr!=m.end();++itr){s<<" "<<(*itr).first<<" : "<<(*itr).second<<endl;}s<<"}"<<endl;return s;}

const ll mod=1e9+7;
const ll inf=1e17;
const int INF=1e9;
const double PI=acos(-1);
const double EPS=1e-10;

//a,bの最大公約数
template <class T>
T gcd(T a,T b) {
	if (b==0) return a;
	else return gcd(b,a%b);
}

template<typename Monoid,typename F>
struct SegmentTree{
	int sz;
	vector<Monoid> node;
	const F op;//演算
	const Monoid e;//単位元
	SegmentTree(int n,const F op,const Monoid &e):op(op),e(e){
		sz=1;
		while(sz<n) sz*=2;
		node.assign(2*sz,e);
	}
	void build(const vector<Monoid> &v){
		int n=v.size();
		for(int i=0;i<n;i++) node[i+sz-1]=v[i];
		for(int i=sz-2;i>=0;i--) node[i]=op(node[2*i+1],node[2*i+2]);
	}
	void update(int k,const Monoid &x){
		k+=sz-1;
		node[k]=x;
		while(k>0){
			k=(k-1)/2;
			node[k]=op(node[2*k+1],node[2*k+2]);
		}
	}
	Monoid query(int a,int b,int k=0,int l=0,int r=-1){
		if(r<0) r=sz;
		if(r<=a || b<=l) return e;
		if(a<=l && r<=b) return node[k];
		else{
			Monoid vl=query(a,b,2*k+1,l,(l+r)/2);
			Monoid vr=query(a,b,2*k+2,(l+r)/2,r);
			return op(vl,vr);
		}
	}
	Monoid operator[](const int &k)const{
		return node[k+sz-1];
	}
};

int main(){
	cin.tie(0);ios::sync_with_stdio(false);
	ll n;
	cin>>n;
	vector<ll> a(n);
	rep(i,n){
		cin>>a[i];
	}
	auto op=[](ll a,ll b){return gcd(a,b);};
	SegmentTree<ll,decltype(op)> seg(n,op,0);
	seg.build(a);
	ll ans=0;
	rep(l,n){
		ll ok=n,ng=l-1,mid;
		while(ok-ng>1){
			mid=(ok+ng)/2;
			if(seg.query(l,mid+1)==1) ok=mid;
			else ng=mid;
		}
		ans+=n-ok;
	}
	cout<<ans<<endl;
}