#include <stdio.h>

void div(int n){
int i=2;
    while(n%i!=0 && i!=n){
         i++; 
    }
     printf("%d ",i);
	if(i!=n){
	  div(n/i);
	}

}

main(){
int i;
printf("Enter number:");scanf("%d",&i);
printf("1 ");
div(i);
}

void div(int n){
static int i=1;
    while(i<=n){
    if(!(n%i))printf(" %d",i);
         i++;
    }
}

main(){
int i;
clrscr();
printf("Enter number:");scanf("%d",&i);
div(i);
getch();
}

#include<stdio.h>
int main()
{
 int n,i=1;
 printf("Value for n\n");
 scanf("%d\n",&n);
 while(i<=n)
 {
   if(n%i == 0)
   printf("%d\n",i);
  
   i++;
 }
}

same program as above, optimising it a little bit.

#include<stdio.h>
int main()
{
 int n,i=1;
 printf("Value for n\n");
 scanf("%d\n",&n);
 while(i <= n/2)
 {
   if(n%i == 0)
   printf("%d\n",i);
  
   i++;
 }
 printf("%d\n",n);
}