Go: package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
	"strings"
)

var sc = bufio.NewScanner(os.Stdin)

//Sliceconvtoi ...
func Sliceconvtoi() []int {
	strs := strings.Split(sc.Text(), " ")

	var ints []int
	var x int

	for _, s := range strs {
		x, _ = strconv.Atoi(s)
		ints = append(ints, x)
	}

	return ints
}

//Min .
func Min(a, b int) int {
	switch a < b {
	case true:
		return a
	default:
		return b
	}
}

//GCDandLCM .
func GCDandLCM(i []int) (int, int) {
	a := i[0]
	b := i[1]

	for {
		if a == b {
			break
		} else {
			a, b = Min(a, b), int(math.Abs(float64(a-b)))
		}
	}

	return a, i[0] * i[1] / a
}

func main() {
	for sc.Scan() {
		i := Sliceconvtoi()
		g, l := GCDandLCM(i)
		fmt.Println(g, l)
	}

}

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

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


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

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

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

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

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

using namespace std;

int main() {
    int a,b,a2,b2;
    int lcm,gcd;
    while(cin >> a >> b){
        a2=a;
        b2=b;
        while(a != b){
        if(a>b){a = a-b;}
        else{b=b-a;}
        }
        lcm = a;
        gcd=a2 / lcm * b2;
        cout << lcm << " " << gcd << endl;
    }

}

C++: #include <iostream>
using namespace std;
long long gcd( long long a, long long b )
{
  long long t;
  if( a < b ){ t = a; a = b; b = t; }
  while( ( t = a % b ) != 0 ){ a = b; b = t; }
  return b;
}
long long lcm( long long a, long long b )
{
  return a * b / gcd(a,b);
}
int main( void )
{
  long long a,b;
  while( 1 ){
    cin >> a >> b;
    if( cin.eof() ) break;
    cout << gcd( a, b ) << ' ' << lcm( a, b ) << endl;
  }
  return 0;
}

C++: #include<iostream>
#include<cstdio>
using namespace std;
long long aaa(long long a,long long b){
	while(1){
		a=a%b;
		if(a==0)break;
		swap(a,b);
	}
	return b;
}

int main(){
	long long a,b;
	while(scanf("%lld%lld",&a,&b)!=EOF){
		long long t=aaa(a,b);
		cout<<t<<" "<<a/t*b<<endl;
	}
	return 0;
}

C++: #include <iostream>
#include <cstdio>
using namespace std;
//最大公約数
int gcd(int a, int b) {
    if (b == 0) return a;
    else return gcd(b, a%b);
}

//最小公倍数
int lcm(int a, int b) {
    int ret = gcd(a,b);
    ret = a*(b/ret);
    return ret;
}

int main(int argc, const char * argv[])
{
    int a, b;
    while (~scanf("%d %d", &a, &b)) {
        printf("%d %d\n", gcd(a, b), lcm(a, b));
    }
    return 0;
}

C++: /*
    ????????°??§???????????¨????????????
*/

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <limits.h>
#include <iostream>
#include <algorithm>
#include <string>
#include <iterator>
#include <vector>
#include <map>
#include <utility>
#define LLU unsigned long long int
#define LL long long int
#define LD long double
using namespace std;
#define LLUmax ULLONG_MAX
#define LLmax LLONG_MAX
#define dmax INT_MAX
#define vd vector<int>
#define vLL vector<long long int>
#define vLLU vector<unsigned long long int> 
#define pb push_back
#define mp make_pair
#define fi first
#define sec second
#define debug printf("asd\n")
#define debugd(a) printf("--%d\n",a)
#define debugdd(a,b) printf("--%d %d\n",a,b)
#define debugarr(a,b) for(int i=0 ; i<b ; i++)printf("%d ",a[i]);printf("\n")
#define newline printf("\n")
#define forin(a,b,c) for(int a=b ; a<c ; a++)
#define forde(a,b,c) for(int a=b ; a<c ; a--)


inline void scd(int &a){scanf("%d",&a);}
inline void scdd(int &a,int &b){scanf("%d %d",&a,&b);}
inline void sctd(int &a,int &b,int &c){scanf("%d %d %d",&a,&b,&c);}
inline void scdlld(long int &a,long int &b){scanf("%I64d %I64d",&a,&b);}
inline void sclld(long long int &a){scanf("%I64d",&a);}

#define scarrd(a,b) for(int index=0 ; index<b ; index++)scanf("%d",&a[index])
#define prdlld(a,b) printf("%I64d %I64d",a,b)
#define prdd(a,b) printf("%d %d",a,b)
#define prd(a) printf("%d",a)
#define prarr(a,b) for(int i=0 ; i<b ; i++)printf("%d ",a[i])
#define iniarr(a,b) for(int i=0 ; i<b ;i++)a[i]=0
#define arr(a,b) int *a=(int *)malloc(b*sizeof(int))
#define llarr(a,b) long long int *a=(long long int *)malloc(b*sizeof(long long int))
#define st(a,b) char *a=(char *)malloc(b*sizeof(char))
#define grav 9.8
#define pi 3.14159265

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

int main()
{
	LL a,b;
	while(scanf("%lld %lld",&a,&b)!=EOF)
	{
		LL gcdz=gcd(a,b);
		LL lcm=(a*b)/gcdz;
		printf("%I64d %I64d\n",gcdz,lcm);
	}
	
	return 0;
}

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

/*
8 6
50000000 30000000


2 24
10000000 150000000
*/

int A = 0;
int B = 0;

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

    return gcd(b, a % b);
}

void solve() {
    int d = gcd(A, B);
    int m = A / d * B;

    printf("%d %d\n", d, m);
}

int main() {
    while (scanf("%d %d", &A, &B) != EOF) {
        solve();
    }

    return 0;
}

C++: #include<cstdio>
#include<iostream>
     
using namespace std;
    
int gcd(int a, int b){

  if(b == 0)  return a;

  return gcd(b, a % b);
}
     
int lcm(int a, int b, int ans_gcd) {
  int ans;
  
  ans = a / ans_gcd * b;

  return ans;
}
     
     
     
     
int main(){
  int a, b;
  int ans_gcd, ans_lcm;

  while (cin >> a >> b) {
    if((a == 0) && (b == 0)) break;

    ans_gcd = gcd(a, b);
    ans_lcm = lcm(a, b, ans_gcd);

    cout << ans_gcd << " " << ans_lcm << endl;
  }

  return 0;
}

C++: #include <iostream>
#include <string>
#include <algorithm>
#include <cstdio>
#include <vector>
#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
using namespace std;

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

int main(){
    int a, b;
    while(cin>>a>>b){
    	int g = gcd(a,b);
    	printf("%d %d\n", g, a*(b/g));
    }
}

C++: #include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)
#define FOR(i,x,n) for(int i=x; i<(n); i++)
#define ALL(n) begin(n),end(n)
#define MOD (1000000007)
#define INF (1e9)
#define INFL (1e18)
 
typedef long long ll;
typedef unsigned int ui;
typedef unsigned long long ull;
template<class T>using arr=vector<vector<T>>;
template<class T>void pr(T x){cout << x << endl;}
template<class T>void prvec(vector<T>& a){rep(i, a.size()-1){cout << a[i] << " ";} cout << a[a.size()-1] << endl;}
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

template<class T>T gcd(T a, T b) {if(b==0) return a; return gcd(b, a%b);}

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

int main()
{
    ll a, b;
    while(cin >> a>>b) printf("%lld %lld\n", gcd(a, b), lcm(a, b));
    return 0;}