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>
#include<string>
#include<iomanip>
using namespace std;
int main(){
	int a,b;
	while(cin>>a>>b){
		int i;
		if(a>=b)
			i=b;
		else
			i=a;
		while(true){
			if(a%i==0&&b%i==0)
				break;
			i--;
		}
		int keep=i;
		cout<<i<<" ";
		if(a>=b)
			i=a;
		else
			i=b;
		while(true){
			if(i%a==0&&i%b==0)
				break;
			i+=keep;
		}
		cout<<i<<endl;
	}
	return 0;
}

C++: #include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<string>
#include<map>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
#include<ctime>
#define RG register
#define file(x) freopen(x".in","r",stdin);freopen(x".out","w",stdout);
using namespace std;

#define ll long long 
int main(){
	ll a,b;
	while(scanf("%lld%lld",&a,&b)!=EOF){
		printf("%lld ",__gcd(a,b));
		printf("%lld\n",1ll*a*b/__gcd(a,b));
	}
	return 0;
}

C++: #include <iostream>

using namespace std;

int main(int argc, char **argv)
{
	int *a, *b, s, t, c;
	int p, q;
	a = &p;
	b = &q;
	while(cin >> p >> q){
		s = *a;
		t = *b;
		c = 1;
		for(int tmp = (*a > *b)? *b : *a, i = 2; i <= tmp; i++){
			while(s%i == 0 && t%i == 0){
				s /= i;
				t /= i;
				tmp /= i;
				c *= i;
			}
		}
		cout << c << " " << ((*a)/c*(*b)) << endl;
	}
	
	return 0;
}

C++: #include<iostream>
#include<cmath>
#include<stdio.h>
using namespace std;

int main(){
	long long a, b, c;
	long long x, y;

	while (cin >> a >> b){
		if (a > b){
			x = a;
			y = b;
		}
		else{
			x = b;
			y = a;
		}
		while (x % y != 0){
			y = x % y;
		}

		cout << y << " " << (a * b / y) << endl;
	}
}

C++: #include <iostream>
using namespace std;
typedef long long ll;
int gcd(int a, int b){
    return b == 0 ? a : gcd(b, a % b);
}
int main(){
    ios::sync_with_stdio(false);
    int a, b;
    while(cin >> a >> b)
        cout << gcd(a, b) << " " << ll(a)*ll(b)/gcd(a, b) << endl;
    return 0;
}

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

using namespace std;

typedef long long ll;
typedef pair<ll,ll> pll;

pll gcdLcm(ll a, ll b) {
  ll x = a, y = b;
  if (x < y) swap(x, y);
  while (y > 0) {
    ll r = x % y;
    x = y;
    y = r;
  }
  return pll(x, a*b/x);
}

int main() {
  ll a, b;
  while (scanf("%lld %lld", &a, &b) == 2) {
    pll r = gcdLcm(a, b);
    printf("%lld %lld\n", r.first, r.second);
  }
  return 0;
}

C++: #include<iostream>
#include<algorithm>
#include<vector>
int main(){
	long int a, b, product;

  	while (std::cin >> a >> b) {
    	product = a * b;
		std::vector<long int> v = {a, b};
    	while (v.at(0) != v.at(1)) { 
      		std::sort(v.begin(), v.end(), std::greater<long int>());
      		v.at(0) = v.at(0) - v.at(1);
		}	
    	std::cout << v.at(0) << " " << product/v.at(0) << std::endl;	
  	}
	return 0;
}

C++: #include <iostream>

#define LL long long

LL GCD(LL a, LL b) {
	LL
		c = a > b ? a : b,
		d = a < b ? a : b;
	while (c != d) {
		c -= d;

		LL tmp[] = {c, d};
		c = std::max(tmp[0], tmp[1]);
		d = std::min(tmp[0], tmp[1]);
	}

	return c;
}

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

int main() {
	int a, b;
	while (std::cin >> a >> b) {
		std::cout << GCD(a, b) << " " << LCM(a, b) << std::endl;
	}
}

C++: #include<iostream>
using namespace std;
long long gcm(long long a, long long b){
	if(b > a){
	long long d;
	d = a;
	a = b;
	b = d;
	}	
	long long c;
	while(b!=0){
		c = a % b;
		a = b;
		b = c;
	}
	return a;
}
int main(){
	long long c,d,e;
	std::cin>>c>>d;
	e = gcm(c,d);
	std::cout<<e<<" "<<(c*d)/e;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int main()
{
	int a[50] = {};
	int b[50] = {};
	int g[50] = {};
	int l[50] = {};
	int i = 0;
	while (cin >> a[i] >> b[i]) {
		i++;
	}
	for (int j = 0; j < i; j++) {
		int n, m,aa,bb;
		aa = a[j];
		bb = b[j];
		while (a[j] != b[j]) {

			m = max(a[j], b[j]);
			n =	max(a[j], b[j])  % min(a[j], b[j]);
			a[j] = m;
			b[j] = n;
			
		}
		g[j] = a[j];
		if (g[j] != 0) {
			aa = aa / g[j];
			bb = bb / g[j];
		}
		l[j] = aa * bb * g[j];
		
	}
	for (int k = 0; k < i; k++) {
		cout << g[k] << l[k] << endl;
	}
	return 0;
}

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

#include <iostream>

using namespace std;

int gcd(int x,int y){
    if(x<y){
        swap(x,y);
    }
    if(y==0){
        return x;
    }else {
        return gcd(y, x % y);
    }
}

int main(){
    int x,y;
    while(cin>>x>>y){
        long long g=gcd(x,y);
        cout<<g<<" "<<y/g*x<<endl;
    }
    return 0;
}

C++: #include<set>
#include<map>
#include<queue>
#include<stack>
#include<cmath>
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#define RG register int
#define rep(i,a,b)	for(RG i=a;i<=b;++i)
#define per(i,a,b)	for(RG i=a;i>=b;--i)
#define ll long long
#define inf (1<<29)
using namespace std;

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

int main()
{
	ll n,m,g;
	while(~scanf("%lld%lld",&n,&m))
	{
		g=gcd(n,m);
		printf("%lld %lld\n",g,n/g*m);
	}
	return 0;
}

C++: #include <iostream>
#include <stdio.h>

//*********************************************************
// 最大公約数（Greatest Common Divisor）を返す。
// 引数に０がある場合は０を返す。
//*********************************************************

int gcd( int m, int n )
{
	// 引数に０がある場合は０を返す
	if ( ( 0 == m ) || ( 0 == n ) )
		return 0;
	
	// ユークリッドの方法
	while( m != n )
	{
		if ( m > n ) m = m - n;
		else         n = n - m;
	}
	return m;
}//gcd

//*********************************************************
// 最小公倍数（Least Common Multiple）を返す。
// 引数に０がある場合は０を返す。
//*********************************************************
int lcm( int m, int n )
{
	// 引数に０がある場合は０を返す
	if ( ( 0 == m ) || ( 0 == n ) )
		return 0;
	
	return ((m / gcd(m, n)) * n); // lcm = m * n / gcd(m,n)
}//lcm

int main(){

	int x,y;
	
	while(std::cin>>x>>y){
		
		std::cout << gcd(x,y) << ' ' << lcm(x,y) << std::endl;
	}
}

C++: #include <iostream>
#include <stdio.h>
#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)
    {
        scanf("%d %d",&n,&m);
        t=d(n,m);
        printf("%d %d",t,n/t*m);
    }
    return 0;
}

C++: #include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
using namespace std;
static const double EPS = 1e-5;
typedef long long ll;
#define FOR(i,n) for(i=0;i<n;i++)
#define rep(i,n) for(int i=0;i<n;i++)

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

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

C++: #include <stdio.h>
using namespace std;

int gcd(unsigned long num1,unsigned long num2) {
	if (num2 == 0) {
		return num1;
	}return gcd(num2, num1 % num2);
}

int lcm(unsigned long n1, unsigned long n2) {
	return n1 * n2 / gcd(n1, n2);
}

int main() {
	unsigned long a, b;
	while (~scanf_s("%d %d",&a,&b)) {
		printf("%d %d\n", gcd(a, b),lcm(a,b));
	}
}