Go: package main
import (
	"os"
	"fmt"
	"strconv"
	"bufio"
	"strings"
)

var sc = bufio.NewScanner(os.Stdin)
var out = bufio.NewWriter(os.Stdout)

func main(){
	sc.Split(bufio.ScanLines)
	defer out.Flush()

	for sc.Scan(){
		a, b := nextInts()
		x, y := gcd(a, b), lcm(a, b)
		fmt.Fprintf(out, "%d %d\n", x, y)
	}

}

func nextInts()(a, b int){
	s := strings.Split(sc.Text(), " ")
	ra, _ := strconv.Atoi(s[0])
	rb, _ := strconv.Atoi(s[1])
	a = ra
	b = rb
	return
}

func gcd(x, y int) int{
	if x<y{
		gcd(y, x)
	}
	for 0<y{
		r := x%y
		x, y = y, r
	}
	return x
}

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

C++: #include <iostream>
 
typedef unsigned int ui;
 
void swap(ui & a, ui & b)
{
    unsigned int tmp = a;
    a = b;
    b = tmp;
}
 
ui gcd(ui a, ui b)
{
    if (a < b) swap(a, b);
 
    ui c = a % b;
    while (c != 0) {
        a = b;
        b = c;
        c = a % b;
    }
 
    return b;
}
 
int main() {
    using namespace std;
 
    ui a, b;
    while (cin >> a >> b) {
        const ui GCD = gcd(a, b);
        const ui LCM = a * (b / GCD);
        cout << GCD << ' ' << LCM << endl;
    }
    return 0;
}

C++: #include<iostream>
using namespace std;
int gcd(int a, int b){
	int t;
	if(a < b){t=a;a=b;b=t;}
	t = b;
	b = a % b;
	a = t;
	if(b == 0){
		return a;
	}else{
		gcd(a,b);
	}
}
int lcm(double a, double b){
	return (a * b) / (gcd(a,b));
}
int main(){
	int a,b;
	while(cin >> a >> b)
	cout << gcd(a,b) << ' ' << lcm(a,b) << '\n';
	return 0;
}

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

void GetGCD(int a, int b, int& GCD)
{
	if(a == 0){
		GCD = b;
		return;
	}
	if(b == 0){
		GCD = a;
		return;
	}
	if(a >= b){
		a = a % b;
	}else{
		b = b % a;
	}
	GetGCD(a, b, GCD);
}

int main()
{
	while(true){
		int a, b;
		cin >> a >> b;
		if(cin.eof()) break;
		int GCD;
		GetGCD(a, b, GCD);
		int LCM = a * (b / GCD);
		cout << GCD << ' ' << LCM << endl;
	}
	return 0;
}

C++: #include <cstdio>

//input
int a, b;

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

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

void solve(){
	printf("%d %d\n", gcd(a, b), lcm(a, b));
}

int main(int argc, char const *argv[]){

	while(scanf("%d %d", &a, &b) != EOF){
		solve();
	}

	return 0;
}

C++: #include<iostream>
using namespace std;
int main(void)
{
    int a,b,fl;
    while(cin>>a>>b)
    {
        fl=0;
        for(int i=1;fl==0;i++)
        {
            if(a%i==0&&b%(a/i)==0)
            {
                cout<<a/i<<" ";
                fl++;
            }
            else;
        }
        fl=0;
        for(int i=1;fl==0;i++)
        {
            if((a*i)%b==0)
            {
                cout<<a*i<<endl;
                fl++;
            }
            else;
        }
    }
    return 0;
}

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

using namespace std;

int gcd(int a, int b){
        int r;
       
        while ((r = a % b) != 0){
            a = b;
            b = r;
        }
        return b;
    }

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

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

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

int main()
{
 while(1){
	int a,b;
	cin>>a>>b;

	if(cin.eof()) break;
	if(a==0||b==0)break;
	
	int g=gcd(a,b);
	cout<<g<<' '<<a/g*b<<endl;
 }
 return 0;
}

C++: #include <stdio.h>
int gcd(long long int x,long long int y)
{
    long long int tem;
    while(y!=0)
    {
        tem=y;
        y=x%y;
        x=tem;
    }
    return x;
}
int main()
{
    long long int a,b,x,y,l,g;
    while(scanf("%lld%lld",&a,&b)==2)
    {
        g=gcd(a,b);
        l=(a*b)/g;
        printf("%lld %lld\n",g,l);
    }
    return 0;
}

C++: /*
 0005-GCD_and_LCM.cpp
 
 http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0005
 */

#include<iostream>
#include<algorithm>

using namespace std;

int main(){
    int a,b;
    while(cin>>a>>b){
        long int temp_a = a;
        long int temp_b = b;
        while(1){
            long int l = max(temp_a,temp_b);
            long int r = min(temp_a,temp_b);
            l = l-r;
            if(l==r){
                cout<<l<<" "<<a/l * b/l * l <<endl;
                break;
            }else{
                temp_a = l;
                temp_b = r;
            }
        }
    }
}

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


long long int GCM(long long int a,int long long b){
	while(a!=b){
		a>b? a-=b:b-=a;
	}
	return a;
}

int main()
{
	ifstream ifs("Text.txt");
	long long int a,b,L,G;
	
	
	ifs>>a;
	do{
	ifs>>b;
	G=GCM(a,b);
	L=a*b/G;
	cout<<G<<" "<<L<<endl;
	}while(ifs>>a);
	cin>>a;
}

C++: #include<iostream>
#include<cstdio>
#include<vector>
#include<algorithm>
#include<cmath>
#include<queue>
#include<stack>
using namespace std;
#define int long long

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

unsigned main(){
    int A,B;
	while(cin>>A>>B){
		printf("%lld %lld\n",gcd(A,B),A*B/gcd(A,B));
	}
    return 0;
}

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


long long int gcd(long long int a,long long int b){
	long long int q;
	q=a%b;
	if(q==0)return b;
	a=b;
	b=q;
	return gcd(a,b);
}
int main(){
	long long int a,b,q,g;
	while(cin>>a&&cin>>b){
		if(b>a){
			q=a;
			a=b;
			b=q;
		}
		g=gcd(a,b);
		cout<<g<<" "<<a*b/g<<endl;
	}
	return 0;
}

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

long long GCD(unsigned long long a,unsigned long long b){
	if(b==0)return a;
	unsigned long long alt=a%b;
	GCD(b,alt);
}

int main(){
	unsigned long long a,b;
	while(cin>>a){
		cin>>b;
		unsigned long long ansGCD=GCD(a,b);
		cout<<ansGCD<<" "<<a*b/ansGCD<<endl;
	}
	return 0;
}

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

long int GCD(long int a, long int b){
  if(a < b){long int c = a; a = b; b = c;}
  while(true){
    long int c = a % b;
    if(c == 0) return b;
    a = b;
    b = c;
  }
  return 0;
}

long int LCM(long int a, long int b){
  return a * b / GCD(a, b);
}

int main(){
  long int a, b;
  while(cin >> a >> b){
    cout << GCD(a, b) << " " << LCM(a, b) << endl;
  }
  return 0;
}

C++: #include<iostream>

int main(){
	long int a, b, r;
	
	while(std::cin >> a >> b){
		long int product = a*b;
		
		// GCD
		if(a < b){
			long int temp = a;
			a = b;
			b = temp;
		}
		while((r = a%b) != 0){
			a = b;
			b = r;
		}
		
		// LCM
		long int lcm = product / b;
		
		// show
		std::cout << b << ' ' << lcm << std::endl;
	}
	
	return 0;
}

C++: #include "iostream"
#include "iomanip"
using namespace std;
int main()
{
	long m, n, a, b, t, c;
	while(cin>>a>>b)
	{
		m=a;   n=b;  
		while(b!=0)  
		{
			c=a%b;
			a=b;
			b=c;
		}
		cout<<a<<' '<<(m/a)*n<<endl;
	}
}

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

long int a,b;

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

int main(){
    while(cin){
        cin >> a >> b;
        if(!cin) break;
        long int ans = gcd(a,b);
        cout << ans << " " << (a*b)/ans << endl;
    }
}

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

int gcd(int a, int b) {
    int r;
    while((r = a % b) != 0) 
    {
        a = b;
        b = r;
    }
    return b;
}

int main(void){
    int a, b, tmp;
    if (a < b){
        tmp = b;
b = a;
a = tmp;

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