C :

#include<stdio.h>
void swap(int *a,int *b)
{
   int temp;
   if(*a<*b)
   {
    temp=*a;
    *a=*b;
    *b=temp;
   }
}
int main()
{
    int m,n,r;
    while(scanf("%d%d",&m,&n)!=EOF)
    {
      swap(&m,&n);
      r=m*n;
      while(m%n!=0)
      {
       m=m%n;
       swap(&m,&n);
      }
      printf("%d %d\n",n,r/n);
    }
    return 0;
} 

C++ :

#include<iostream>
using namespace std;
int main()
{
	int a,b,c,i;
	cin>>a>>b;
	if(a>b)
	{
		c=b;
		b=a;
		a=c;
	}
	for(i=1;i<a+1;i++)
	{
		if(a%i==0&&b%i==0)
		{
			c=i;
		}
	}
	i=a*b/c;
	cout<<c<<" "<<i;
}

Java :

import java.util.Scanner;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		final int n = 100000;
		
		Scanner input = new Scanner(System.in);
		
		int x = input.nextInt();
		int y = input.nextInt();
		int r,x1 = x,y1 = y,m;
		while(y != 0){
			r = x % y;
			x = y;
			y = r;
		}
		m = x * (x1 / x) * (y1 / x);
		System.out.println(x + " " + m);
		input.close();
	}
	
	

}

Python :

a = map(lambda x:int(x), raw_input().split())

def yu(a, b):
    if a < b:
        a, b = b, a
    a = a % b
    if a == 0:
        return b
    return yu(b,a)
x = yu(a[0], a[1])
print "%d %d" % (x, a[0] * a[1] // x)