#include <bits/stdc++.h>
using namespace std;
#define int long long
#define vi vector<int>
#define vii vector<vi>
#define pb push_back
#define pir pair<int, int>
const int P = 1e9 + 7;
const int N = 1e6 + 7;
const int inf = 0x3f3f3f3f3f3f3f3f; // longlong
const int ing = 1e18;
// const int mod = 998244353;
// cout << fixed << setprecision(5) << number << endl;
// tuple
// prev(it)   next(it)
const int mod = 1e9 + 7;
int n, m;
int ax, bx, ay, by;
bool st[N];
int pr[N];
void get(int n)
{
    for (int i = 2; i <= 1e6; i++)
    {
        if (!st[i])
        {
            pr[++pr[0]] = i;
        }
        for (int j = 1; pr[j] <= 1e6 / i; j++)
        {
            st[pr[j] * i] = 1;
            if (pr[j] % i == 0)
                break;
        }
    }
    st[1] = 1;
}
void solve()
{
    cin >> n;
    vector<int> a(n + 1);
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
    }
    get(N);
    map<int, int> mp;
    int ans = 0;
    for (int i = 1; i <= n; i++)
    {
        ax = a[i];
        for (int j = 1; pr[j] <= ax; j++)
        {
            if (!st[ax])
            {
                
               //cout<<i<<" "<<mp[ax]<<" "<<ax<<"\n";
                ans += (n - i+1) * (i - mp[ax]);
                mp[ax] = i;
                break;
            }
            if (ax % pr[j] == 0)
            {
                while (ax % pr[j] == 0) ax /= pr[j];
                
                //cout<<i<<" "<<mp[pr[j]]<<" "<<pr[j]<<"\n";
                ans += (n - i+1) * (i - mp[pr[j]]);
                mp[pr[j]] = i;
                
            }
        }
    }
    cout << ans << "\n";
}
signed main()
{
    cin.tie(0)->sync_with_stdio(0);
    int _ = 1;
    // cin >> _;
    while (_--)
    {
        solve();
    }
}