Having problem with the C program to find the common factors between 2 numbers.

#include <conio.h>
#include <stdio.h>

int main(){
	
	int a, b, i, j;
	int total_a=0, total_b=0;
	
	printf("Enter your integers: \n");
	scanf(" %d%d", &a, &b);
	
	for(i=1, j=1; i<=a,j<=b; i++,j++){
		
		if(a%i==0)
			total_a = total_a*10 + i;
			
		if(b%j==0)
			total_b = total_b*10 + j;
		
	}
	
	/*printf(" %d %d", total_a, total_b);
	int total=0;
	printf(" %d", total);*/

	int rem_a, rem_b, total =0;

	while(total_a!=0){
		
		rem_a = total_a%10;
		
		while(total_b!=0){
			
			rem_b =total_b%10;
			
			if(rem_a==rem_b){
				total = total*10 + rem_a;
			}
			
			total_b/=10;
		}
		
		total_a/=10;
	}
	
	printf(" %d", total);
	
	return 0;
}