#include <iostream>
#include <cstdio>
using namespace std;

int gcd(int a, int b)
{int p,q,r;if(a<b){p=b;b=a;a=p;}    
while(r!=0){    q=b/a;    r=b%a;    b=a;    a=r;    }    return b;}
int main(void){    int a, b;    while(cin >> a >> b) 
{      int lcm = a/gcd(a,b)*b;      cout << gcd(a,b) << "" << lcm << endl;}
    return 0;}
