#include <stdio.h>

void primefactor(int number) {
  int i;

  for(i = 2 ; i <= number ; i++) {
   if (number % i == 0){
      printf("%d", i);
      number = number / i;
      i = 1;
}
  else
    i = i;
  }
}

int main (void)
{
  int number;
  printf("Enter any number: ");
  scanf("%d", &number);

  printf("\n");
  primefactor(number);
  printf("\n");

  return 0;
}