import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;


class Main {
	public static void main(String[] args) {
		new Main().run();
	}
	
	long gcd(long a,long b) {
		return a==0?b:gcd(b%a,a);
	}
	
	long lcm(long a,long b) {
		return a/gcd(a,b)*b;
	}
	
	int dfs(int cur,int par,ArrayList<Integer>[] g,boolean[] vis) {
		if(vis[cur])return 0;
		int sz=1;
		vis[cur]=true;
		for(int dst:g[cur]) {
			if(dst==par)continue;
			sz+=dfs(dst,cur,g,vis);
		}
		return sz;
	}
	
	void run() {
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		int K=sc.nextInt();
		ArrayList<Integer>[] g=new ArrayList[N];
		for(int i=0;i<N;++i)g[i]=new ArrayList<Integer>();
		int[] ord=new int[N];
		for(int i=0;i<N;++i)ord[i]=i;
		for(int i=0;i<K;++i) {
			int x=sc.nextInt();
			int y=sc.nextInt();
			--x;--y;
			ord[x]^=ord[y];ord[y]^=ord[x];ord[x]^=ord[y];
		}
		for(int i=0;i<N;++i) {
			g[i].add(ord[i]);
		}
		long ans=1;
		boolean[] vis=new boolean[N];
		for(int i=0;i<N;++i) {
			if(vis[i])continue;
			ans=lcm(ans,dfs(i,-1,g,vis));
		}
		System.out.println(ans);
	}
	
	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}