Go: package main

import "fmt"

func gcd(x, y int64) int64 {
	for y != 0 {
		r := x % y
		x = y
		y = r
	}
	return x
}

func lcm(x, y int64) int64 {
	return x / gcd(x, y) * y
}

func main() {
	for {
		var a, b int64

		fmt.Scanf("%d %d", &a, &b)

		if a == 0 && b == 0 {
			break
		}

		fmt.Printf("%d %d\n", gcd(a, b), lcm(a, b))
	}
}

C++: #include <iostream>

using namespace std;

typedef long long ll;

ll gcd(ll a,ll b){
  if (b==0) return a;
  return gcd(b,a%b);
}

int main(){
  ll a,b;
  while (cin>>a>>b){
    ll g,l;
    g=gcd(a,b);
    l=a*b/g;
    cout<<g<<" "<<l<<endl;
  }
  return 0;
}

C++: #include<cstdio>
#include<iostream>
#include <algorithm>

using namespace std;

int main() {
	long int  a, b;
	while (cin >> a >> b) {
		cout << __gcd(a, b) << " " << a / __gcd(a, b) * b << endl;

	}

}

C++: #include <bits/stdc++.h>
using namespace std;
int main() {
    int a,b;
    while(cin >> a >> b){
        int g = __gcd(a,b);
        int l = a / g * b;
        cout << g << " " << l << endl;
    }
}

C++: #include <bits/stdc++.h>
#define int long long
using namespace std;
 
constexpr int gcd(int a, int b) {
  while (b) b ^= a ^= b ^= a %= b;
  return a;
}
 
constexpr int lcm(const int &a, const int &b) {
  return a / gcd(a, b) * b;
}
 
signed main() {
  int a, b;
  while (cin >> a >> b) cout << gcd(a, b) << ' ' << lcm(a, b) << endl;
}

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

int main(){
	long a, b, t, gcd, lcm;
	while( cin >> a >>b ){
		t=a*b;
		while(a!=b){
			while(a>b) a-=b;
			while(a<b) b-=a;
		}
		gcd=a;
		lcm=t/gcd;
		cout << gcd << lcm << endl;
	}
 return 0;
}

C++: #include <iostream>

using namespace std;

typedef unsigned long long ull;

int gcd(ull a,ull b){
  if(b > 0) return gcd(b, a % b);
  else return a;
}

int main(){
  ull a,b,c;
	while(cin >> a >> b){
	  c = gcd(a,b);
	  cout << c << " " << (ull)((a * b)/c) << endl; 
	}
  return 0;
}

C++: // B.cpp

#include <iostream>
#include <cmath>
#include <string>

using namespace std;

int gcd(int, int);
int lcm(int, int);

int main(void) {
	int a, b;
	cin >> a >> b; 
	cout << gcd(a, b) << " " <<  lcm(a, b) << endl;

	return 0;
}

int gcd(int a, int b) {
	int max, min, res;
	
	res = 1;
	
	if(a > b){
		max = a, min = b;
	}
	if(a < b){
		max = b, min = a;
	}
	while(res) {
		res = max % min;
		max = min;
		min = res;
	}
	return max;
}
int lcm(int a, int b) {
	int max, min, res;
	res = 1;
	if(a > b){
		max = a, min = b;
	}
	if(a < b){
		max = b, min = a;
	}
	while(res) {
		res = max % min;
		max = min;
		min = res;
	}
	return a / max * b;
}

C++: #include <iostream>

#define CASE long int

using namespace std;

CASE GCD(CASE x, CASE y)
{
	if (x == 0 || y == 0)
		return x + y;
	else
	{
		if (x >= y)
		{
			x = x - y;
			GCD(x, y);
		}
		else
		{
			y = y - x;
			GCD(x, y);
		}
	}
}

int main(){
	CASE a, b;
		cin >> a;
		cin >> b;
		cout << GCD(a, b) << " " << a * b / GCD(a, b) << endl;
	return 0;
}

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

int saidai(int a,int b){
	while(a !=b){
		if(a>b){
			a -=b;
		}
		else{
			b -=a;
		}
	}
	return a;
}
int saisyou(int a,int b){
	return a*b/saidai(a,b);
}

int main(){
	int a,b,c,d;
	cin>>a; cin>>b;
	c=saidai(a,b);
	d=saisyou(a,b);
	cout<<c<<" "<<d;
	return 0;
}

C++: #include<iostream>


#define ll long long

using namespace std;

ll gcd(ll a, ll b) {
    if (a < b) swap(a, b);
    return b == 0 ? a : gcd(b, a % b);
}

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


void solver() {
    ll a, b;
    while (cin >> a >> b) {
        cout << gcd(a, b) << " " << lcm(a, b) << endl;
    }
}

int main() {
    solver();
    return 0;
}

C++: #include <iostream>
using namespace std;
int main(void)
{
    unsigned int a, b;
    while (cin >> a >> b)
    {
        int r = 1;
        unsigned int g = 1, l = 1;
        if (a < b)
        {
            unsigned int _a = a, _b = b;
            while (_b % _a != 0)
            {
                r = _b % _a;
                _b = _a;
                _a = r;
            }
            g = _a;
            a = a / g;
            b = b / g;
            l = g * a * b;
        }
        else if (b < a)
        {
            unsigned int _a = a, _b = b;
            while (_a % _b != 0)
            {
                r = _a % _b;
                _a = _b;
                _b = r;
            }
            g = _b;
            a = a / g;
            b = b / g;
            l = g * a * b;
        }
        cout << g << ' ' << l << endl;
    }
}

C++: #include<iostream>
#include<cmath>
using namespace std;
int d(int n,int m)
{
    int t;
    while(m!=0)
    {
        if(n<m) {t=n;n=m;m=t;}
        t=m;
        m=n%m;
        n=t;
    }
    return n;
}
int main()
{
    int t,n,m;
    while(1)
    {
        cin>>n>>m;
        t=d(n,m);
        cout<<t<<" "<<n*(m/t)<<endl;
    }
    return 0;
}

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

int saidai(int a,int b){
	while(a !=b){
		if(a>b){
			a -=b;
		}
		else{
			b -=a;
		}
	}
	return a;
}

int saisyou(int a,int b){
	return a*b/saidai(a,b);
}


int main(){
	int a,b,c,d;
	cin>>a;
	cin>>b;

	c=saidai(a,b);
	d=saisyou(a,b);
	cout<<c<<" "<<d;
	return 0;
}

C++: #include<stdio.h>
int main(void)
{
	int n,a,s,i,d,c,j,x,g,w,z,m;
	while(scanf("%d %d",&a,&s)!=EOF){
		w=a; z=s;
		if(a==0&&s==0) break;
		if(a<s){
			n=a;
			a=s;
			s=n;
		}
		while(s!=0){
			a=a%s;
			g=a;
			a=s;
			s=g;
		}
		m=(w/a)*(z/a)*a;
		printf("%d %d\n",a,m);	
	}
	return 0;
}

C++: #include <stdio.h>

int main(void) {
	int buf,i,c;
	long int a,b,gcd, lcm;
	
	while(scanf("%ld%ld",&a,&b) != EOF){
		if(b > a){buf = a;a = b;b = buf;}
		for(i = 1;;i++){
			if(b%(a/i) == 0) {gcd = a/i;break;}
		}
		for(i = 1; ;i++){
			if((a*i)%b == 0) {lcm = a*i;break;}
		}
		printf("%d %d\n",gcd, lcm);
	}
	
	return 0;
}

C++: #include <iostream>
#include <cmath>
#include <cstdio>
#include <algorithm>
#include <vector>
#include <sstream>
#include <string>
#include <cstdlib>
using namespace std;

// 一行取って、一番初めのTを習得
template <class T> int streamvar(std::istream& in, T& var)
{
    string s;
    if (!in) {
        return 1;
    }
    getline(in, s);
    istringstream is(s);
    is >> var;
    if (is.fail()) 
        return 1;
    return 0;
}
// 一行取って、T vectorに格納する
template <class T> int streamvec(std::istream& in, std::vector<T> &v)
{
    v.clear();
    string s;

    if (!in) 
        return 1;
    getline(in, s);
    if (in.fail()) 
        return 1;
    istringstream is(s);
    while (1) {
        T tmp;
        is >> tmp;
        if (is.fail())
            break;
        v.push_back(tmp);
    }
    return 0;
}

long long gcd(long long a, long long b)
{
    if (!b) return a;
    return gcd(b, a % b);
}

int main(void)
{
    vector<int> v;
    while (!streamvec(cin, v)) {
        cout << gcd(v[0], v[1]) << " " << (long long)v[0] / gcd(v[0], v[1]) * v[1] << endl;
    }
    return 0;
}

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

int gcd (int a, int b)
{
    if (b == 0){
        return (b);
    }
    else {
        gcd(b, a % b);
    }
}
int lcm(int a, int b)
{
    while (1){
        int i = 2;
        if (a % i == 0 && b % i == 0){
            return (i);
            break;
        }
        i++;
    }
}

int main()
{
    int a, b;

    cin >> a;
    cin >> b;
  
 

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

C++: 
#include <iostream>
#include <map>
#include <set>
#include <algorithm>
#include <cstdio>
#include <queue>
#include <functional>
#include <string.h>
#include <cmath>

using namespace std;

int gcd(int a, int b)
{
    while(b){
        a %= b;
        a ^= b ^= a ^= b;
    }
    return a;
}

int main()
{
    int a, b;
    while(cin>>a>>b){
        int g = gcd(a, b);
        cout << g << " " << a/g*b << endl;
    }
}