import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] sa = br.readLine().split(" ");
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(sa[i]);
		}
		br.close();

		int m = 200000;
		Eratosthenes era = new Eratosthenes(m);
		List<List<Integer>> list = new ArrayList<>(m + 1);
		for (int i = 0; i <= m; i++) {
			list.add(new ArrayList<>());
		}
		for (int i = 0; i < n; i++) {
			Map<Integer, Integer> map = era.bunkai(a[i]);
			for (int k : map.keySet()) {
				list.get(k).add(i);
			}
		}

		long min = 1;
		UnionFind uf = new UnionFind(n);
		for (int i = 2; i <= m; i++) {
			List<Integer> wk = list.get(i);
			if (min == 1 && !wk.isEmpty()) {
				min = i;
			}
			for (int j = 1; j < wk.size(); j++) {
				uf.union(wk.get(0), wk.get(j));
			}
		}

		long num = uf.num - 1;
		if (min % 2 == 1) {
			num++;
		}
		long ans = num * 2;
		if (min == 3 && num == 2) {
			ans = 3;
		}
		System.out.println(ans);
	}

	static class UnionFind {
		int[] parent, size;
		int num = 0; // 連結成分の数

		UnionFind(int n) {
			parent = new int[n];
			size = new int[n];
			num = n;
			for (int i = 0; i < n; i++) {
				parent[i] = i;
				size[i] = 1;
			}
		}

		void union(int x, int y) {
			int px = find(x);
			int py = find(y);
			if (px != py) {
				parent[px] = py;
				size[py] += size[px];
				num--;
			}
		}

		int find(int x) {
			if (parent[x] == x) {
				return x;
			}
			parent[x] = find(parent[x]);
			return parent[x];
		}

		/**
		 * xとyが同一連結成分か
		 */
		boolean same(int x, int y) {
			return find(x) == find(y);
		}

		/**
		 * xを含む連結成分のサイズ
		 */
		int size(int x) {
			return size[find(x)];
		}
	}

	static class Eratosthenes {
		int[] div;

		public Eratosthenes(int n) {
			div = new int[n + 1];
			if (n < 2) return;
			div[0] = -1;
			div[1] = -1;
			int end = (int) Math.sqrt(n) + 1;
			for (int i = 2; i <= end; i++) {
				if (div[i] == 0) {
					div[i] = i;
					for (int j = i * i; j <= n; j+=i) {
						if (div[j] == 0) div[j] = i;
					}
				}
			}
			for (int i = end + 1; i <= n; i++) {
				if (div[i] == 0) div[i] = i;
			}
		}

		public Map<Integer, Integer> bunkai(int x) {
			Map<Integer, Integer> soinsu = new HashMap<>();
			while (x > 1) {
				Integer d = div[x];
				soinsu.put(d, soinsu.getOrDefault(d, 0) + 1);
				x /= d;
			}
			return soinsu;
		}

		public boolean isSosuu(int x) {
			return div[x] == x;
		}
	}
}