use std::io::Read;

fn g(a: u64, b: u64) -> u64 {
	if b == 0 {
		a
	} else {
		g(b, a % b)
	}
}

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let n: Vec<u64> = s.split_whitespace().flat_map(str::parse).collect();
	let mut a = 0;
	for i in 1..n.len() - 2 {
		for j in i + 1..n.len() - 1 {
			let d = g(n[i], n[j]);
			if d == 1 {
				a += n.len() - j - 1;
				continue;
			}
			for k in j + 1..n.len() {
				if g(d, n[k]) == 1 {
					a += 1;
				}
			}
		}
	}
	println!("{a}")
}