Go: package main

import "fmt"

func main() {
	var gcdArr, lcmArr [50]int
	var count int
	for {
		var x, y int
		fmt.Scanf("%d %d", &x, &y)
		if count == 51 {
			break
		}
		if x < y {
			rep := x
			x, y = y, rep
		}
		gcd := x % y
		lcm := x * y
		for gcd != 0 {
			x, y, gcd = y, gcd, x%y
		}
		gcdArr[count] = y
		lcmArr[count] = lcm / y
		count++
	}
	for i := 0; i < count; i++ {
		fmt.Printf("%d %d\n", gcdArr[i], lcmArr[i])
	}
}

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

int main(){

	int a, b;

	while(std::cin >> a >> b){

		int minmul; //least common multiple
		int maxdivi = 1; //greatest common divisor
		int tmp_a = a;
		int tmp_b = b;

		if(a == 0 || b == 0){
			std::cout << 0 << " " << 0 << std::endl;

		}else{					//Euclidean Algorithm

			if(b > a)
				std::swap(a, b);

			while(a % b != 0){
				a = a % b;
				if(b > a)
					std::swap(a, b);
			}
		
		maxdivi = b;
		minmul = (tmp_a / maxdivi) * tmp_b; //a*b/maxdivi

		std::cout << maxdivi << " " << minmul << std::endl;
		}
	}

	return 0;
}

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

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



ll a, b;

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

}

C++: #include<iostream>
using namespace std;
int main(){
int a,b,i,ii,iii,maxkouyakusuu=0,lowkoubaisuu=20000000000000;
while(i>50){
cin>>a>>b;
for(ii=0;ii<a*b;++ii){
  if(a%ii==0 && b%ii==0 && ii>maxkouyakusuu){
    maxkouyakusuu=ii;
  }
for(iii=0;iii<a*b;++iii){
  if(iii%a==0 && iii%b==0 && iii<lowkoubaisuu){
    lowkoubaisuu=iii;
  }
}
}
  cout<<maxkouyakusuu<<" "<<lowkoubaisuu<<endl;
  ++i;
}
  return 0;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int main() {
	long long a, b;
	while (cin >> a >> b){
		long long gcd;
		long long c = max(a, b);
		long long d = min(a, b);
		while (true){
			if (c % d == 0) {
				gcd = d;
				goto C;
			}
			else{
				c -= d;
				if (c <= d){
					swap(c, d);
				}
			}
		}
	C:
		cout << gcd << ' ' << a*b / gcd << endl;
	}
}

C++: #include <iostream>

using namespace std;

int getGcd(int a, int b)
{
  while (a && b) {
    if (a > b) a %= b;
    else if (b > a) b %= a;
    else if (a == b) return a;
  }

  if (a > b) return a;
  return b;
}

int main(void)
{
  int a, b;

  while (cin >> a >> b) {
    int gcd = getGcd(a, b);
    cout << gcd << ' ' << a * (b / gcd) << endl;
  }

  return 0;
}

C++: #include<cstdio>
int g(int x,int y){return y?g(y,x%y):x;}
int main(){
int x,y;
while(cin>>x>>y)printf("%d %d\n",g(x,y),x*y/g(x,y));
}

C++: #include "iostream"

using namespace std;

void keisann(int a, int b) {
	long long ac = a;
	long long bc = b;
	bool d = true;
	do {
		a = a%b;
		if (a == 0) {
			cout << b << " ";
			cout << (ac*bc) / b << endl;
			d = false;
			continue;
		}
		b = b%a;
		if (b == 0) {
			cout << a << " ";
			cout << (ac*bc) / a << endl;
			d = false;
			continue;
		}
	} while (d == true);
}

int main()
{
	int a, b;
	while (cin >> a, a != EOF) {
		cin >> b;
		if (a > b) { keisann(a, b); }
		else if (a < b) {
			int c = a;
			a = b;
			b = c;
			keisann(a, b);
		}
		else if (a == b) {
			cout << a << " " << a << endl;
		}
	}
	return 0;
}

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

inline ll gcd(const ll &a, const ll &b) { return b==0 ? a : gcd(b, a%b); }
inline ll lcm(const ll &a, const ll &b) { return a / gcd(a, b) * b; }

int main() {
	
	long long a, b;
	
	while(cin >> a >> b) {
		cout << gcd(a, b) << ' ' << lcm(a, b) << endl;
		if(cin.eof()) break;
	}
	
	return 0;
}

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

using namespace std;

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

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

int main()
{
	int a,b;
	while(~scanf("%d%d",&a,&b))
	{
		cout<<gcd(a,b)<<' '<<lcm(a,b)<<endl;
	}

	return 0;
}

C++: #include <bits/stdc++.h>
#define int long long
using namespace std;
const int INF = 1e9 + 7, MOD = 1e9 + 7;
const long long LINF = 1e18;
const int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};

long long gcd(long long a, long long b) {
	return b ? gcd(b, a % b) : a;
}
long long lcm(long long a, long long b) {
	return a / gcd(a, b) * b;
}

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

C++: #include <iostream>
#include <cstdio>
using namespace std;
int main(){
	unsigned long long a,b,c,d,maxx=0,minn=0;
	while (scanf("%llu %llu",&a,&b)!=EOF){
		if (a>b){
			d=a%b;
			if (d==0) maxx=b;
			else{
				maxx=b%d;
				if (maxx==0)maxx=d;
			}
		}
		else {
			d=b%a;
			if (d==0) maxx=a;
			else{
				maxx=a%d;
				if (maxx==0)maxx=d;
			}
		}
		cout<<maxx<<" "<<a*b/maxx<<endl;
	}
	return 0;
}

C++: #include <iostream>

using namespace std;

int gcd(int a, int b){ return a%b ? gcd(b, a%b) : 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>
#include <cstdio>
#include <fstream>
#include <algorithm>
#include <cmath>
#include <deque>
#include <vector>
#include <queue>
#include <string>
#include <cstring>
#include <map>
#include <stack>
#include <set>
#include <numeric>
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll gcd(ll a,ll b){
    if(b==0)
        return a;
    return gcd(b,a%b);  //递归求最大公约数
}
ll lcm(ll a,ll b){
    return a*b/gcd(a,b);    //递归求最小公倍数
}
int main()
{
    ll a,b;
    while(cin >> a >> b)
    {
        cout << gcd(a,b)<< " "<<lcm(a,b)<<endl;
    }
    return 0;
}

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

using namespace std;

long calc_gcd(long num1, long num2) {
  long greater = max(num1, num2);
  long less = min(num1, num2);
  long remainder = greater % less;

  if(remainder == 0) {
    return less;
  }

  return calc_gcd(less, remainder);
}


int main() {
  long num1, num2;

  while(cin >> num1 >> num2) {
    long gcd = calc_gcd(num1, num2);

    cout << gcd << ' ' << num1 * num2 /gcd << endl;
  }
}

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

int main(){
	long long a,b;
	while(cin >> a >> b){
		if (a < b){
			long long n = b;
			b = a;
			a = n;
		}
		long long times = a * b;
		vector<int> num;
		long long gcd,lcm;
		while(1){
			long long n;
			n = a % b;
			if(n == 0){
				break;
			}
			a = b;
			b = n;	//ユークリッドの互除法
		}
		gcd = b;
		lcm = times / gcd;
		cout << gcd << " " << lcm << endl;
	}
	return 0;
}

C++: #include <iostream>

using namespace std;

typedef long long ll;

ll gcd(ll x, ll y)
{
    while(y>0) {
        x = x%y;
        x^=y^=x^=y;
    }
    return x;
}

ll lcm(ll x, ll y)
{
    return (x * y)/gcd(x, y); 
}

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

}

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

using namespace std;

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

int main(){
  
  unsigned long long a,b;
  cin>>a>>b;
  
  unsigned long long ans1 = gcd(a,b);
  cout<<ans1<<" "<<b/ans1*a<<endl;
  return 0;
}

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

int main(){
	int a, b, min ,max, gcd, lcm;
	
	while(cin >> a >> b){
		
		min = min(a, b);
		max = max(a, b);
		
		for(int i = 0; i < min; i++){
			if(min % i == 0 && max % i == 0) gcd = i;
		}
		
		while(1){
			int i = 1;
			if( (max * i) % min == 0) {
				lcm = max *i;
				break;
			}
			else i++;
		}
		
		cout << gcd <<  " " << lcm << endl;
}