use std::io::Read;
use std::collections::{HashMap, BinaryHeap};
use std::cmp::{max, min};

fn gcd(a: usize, b: usize) -> usize {
    if a % b == 0 {
        return b;
    }
    gcd(b, a % b)
}

fn main() {
    let mut all_data = String::new();
    std::io::stdin().read_to_string(&mut all_data).ok();
    let all_data: Vec<&str> = all_data.trim().split('\n').map(|s| s.trim()).collect();
    let a: Vec<usize> = all_data.iter().skip(1).next().unwrap().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let mut keys: BinaryHeap<isize> = BinaryHeap::new();
    let mut gcd2count: HashMap<usize, usize> = HashMap::new();
    for val in a {
        let mut temp_keys = keys.clone().to_owned();
        for _ in 0..keys.len() {
            let key = keys.pop().map(|s| (s as isize) * -1).unwrap() as usize;
            let count = *gcd2count.get(&key).unwrap();
            let next_key = gcd(max(key, val), min(key, val));
            if let Some(x) = gcd2count.get_mut(&next_key) {
                *x += count;
            } else {
                gcd2count.insert(next_key, count);
                temp_keys.push(-(next_key as isize));
            }
        }
        if let Some(x) = gcd2count.get_mut(&val) {
            *x += 1;
        } else {
            gcd2count.insert(val, 1);
            temp_keys.push(-(val as isize));
        }
        keys = temp_keys;
    }
    println!("{}", gcd2count.get(&1usize).unwrap_or(&0usize));
}