Go: package main

import "fmt"

func GCM(a, b int) int {
	if a < b {
		a, b = b, a
	}
	if b == 0 {
		return a
	}
	return GCM(b, a % b)
}

func LCM(a, b int) int {
	return a*b/GCM(a, b)
}

func main() {

	for {
		var a, b int
		var G, L int
		fmt.Scanf("%d %d", &a, &b)
		if a == 0 {
			break
		}
		G = GCM(a, b)
		L = LCM(a, b)
		fmt.Printf("%d %d", G, L)
	}
}

C++: #define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES

#include "bits/stdc++.h"
#define REP(i,a,b) for(int i=a;i<b;++i)
#define rep(i,n) REP(i,0,n)
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
#define ALL(a) begin(a),end(a)
#define ifnot(a) if(not (a))
#define dump(x)  cerr << #x << " = " << (x) << endl
using namespace std;

// #define int ll
#ifdef _MSC_VER
const bool test = true;
#else 
const bool test = false;
#endif

int dx[] = { 0,1,0,-1 };
int dy[] = { 1,0,-1,0 };
#define INF (1 << 28)
ull mod = (int)1e9 + 7;
//.....................
const int MAX = (int)1e5 + 5;

template<typename T>
T gcd(T a, T b)
{
	T c;
	while (a != 0) {
		c = a; a = b%a;  b = c;
	}
	return b;
}

template<typename T>
T lcm(T m, T n)
{
	return ((m / gcd(m, n)) * n);
}

signed main() {
	ll a, b;
	while (cin >> a >> b) {
		cout << gcd(a, b) << " " << lcm(a, b) << endl;
	}
	return 0;
}

C++: 
//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <string>
#include <cstring>
#include <ctime>
#include <climits>
#include <limits>

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v; }
template<class T> inline string toString(T x) { ostringstream sout; sout << x; return sout.str(); }

//math
//-------------------------------------------
template<class T> inline T sqr(T x) { return x * x; }

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define EXISTch(s,c) ((((s).find_first_of(c)) != std::string::npos)? 1 : 0)//cがあれば1 if(1)
#define SORT(c) sort((c).begin(),(c).end())

#define REP(i,n) for(int i=0;i<(int)n;++i)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI = acos(-1.0);
const int INF = (int)1000000007;
const LL MOD = (LL)1000000007;//10^9+7
const LL INF2 = (LL)100000000000000000;//10^18

int gcd(int a, int b) {
	return b != 0 ? gcd(b, a % b) : a;
}

int lcm(int a, int b) {
	return a * b / gcd(a, b);
}



int main() {

	int a, b;
	while (cin >> a) {
		cin >> b;

		cout << gcd(a, b) << " " << lcm(a, b) << endl;
	}
	
	return 0;

}

C++: #include <iostream>
#include <cstdio>
using namespace std;

int gcd(int a, int b) {
  	int q,r;
	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;
}

C++: #include<iostream>
using namespace std;
int main(){
int a,b,g,x,y,L,i=0;
while(i>50){
cin>>a>>b;
x=a;y=b;
while(1){
  if(x<y){y-x;}
  else if(x>y){x-y;}
  else if(x==y){g=x;break;}
}
L=(a*b)/g;
  cout<<g<<" "<<L<<endl;
  ++i;
}
  return 0;
}

C++: #include <iostream>
using namespace std;

int main(void){
    long long a,b,c,d,x,ans01,ans02;
    int count = 0;
    while(std::cin >> a >> b && count < 50){
        if(b > a){
           x = a;
           a = b;
           b = x;
        }
        c = a % b;
        d = b % c;
        if(d == 0) {
            ans01 = c;
            ans02 = a * b / c;
        }
        else if (c % d == 0) {
            ans01 = d;
            ans02 = a * b / d;
        }
        std::cout << ans01 << " " << ans02 << std::endl;
        count ++;
    }
    return 0;
}

C++: //0005
#include <bits/stdc++.h>
using namespace std;

int main(){
    int a,b;

    while(cin>>a>>b){
        cout<<__gcd(a,b)<<" "<<a / __gcd(a,b) * b <<endl;
    }
    return 0;
}

C++: #include<iostream>
#include<vector>
using namespace std;
int gcd(int a,int b){
  if(b==0)return a;
  return gcd(b,a%b);
}
int main(){
  while(true){
    int a,b;
    cin >>a>>b;
    if(cin.eof())return 0;
    int g = gcd(a,b);
    cout << g <<' '<<a/g*b<<endl;
  }
}

C++: #include<iostream>
using namespace std;
int main(){
int a,b,g,x,y,L,i=0;
while(i>50){
cin>>a>>b;
x=a;y=b;
while(1){
  if(x<y){y-x;}
  else if(x>y){x-y;}
  else if(x==y){x=g;break;}
}
L=(a*b)/g;
  cout<<g<<" "<<L<<endl;
  ++i;
}
  return 0;
}

C++: #include <iostream>
using namespace std;
 
int gcd(int x, int y) {
    int amari;
    while(y != 0) {
        amari = x % y;
        x = y;
        y = amari;
    }
    return x;
}
 
int lcm(int x, int y) {
    int g = gcd(x, y);
    return x/g*y;
}

int main() {
    int a, b;
    while(true){
        cin >> a >> b;
        cout << gcd(a, b) << ' ' << lcm(a, b) << endl;
    }
}

C++: #include <iostream>
#include <algorithm>
using namespace std;

int main(){
	int a, b;
	int multi;

	while(cin >> a >> b){
		multi = a*b;

		if(a<b){
			int s;
			s = a;
			a = b;
			b = s;
		}

		for(; b != 0;){
			int t;
			t = b;
			b = a % b;
			a = t;
		}

		cout << a << ' ' << multi/a << endl;
	}

	return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <fstream>
#include <sstream>
#include <string>
#include <iomanip>
#include <math.h>
#include <limits>

using namespace std;

typedef unsigned long long ullong;

class cgl
{
public:
	ullong gcd(ullong, ullong);
	ullong lcm(ullong, ullong, ullong);
};

ullong cgl::gcd(ullong a, ullong b)
{
	if (a % b == 0)
		return b;
	return gcd(b, a % b);
}

ullong cgl::lcm(ullong a, ullong b, ullong g)
{
	return a * b / g;
}

int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);

	cgl cg;
	ullong a, b, g;

	for (;;)
	{
		cin >> a >> b;
		if (fin.fail()) break;
		g = cg.gcd(a, b);
		cout << g << " " << cg.lcm(a, b, g) << endl;
	}

	return 0;
}