#include <stdio.h>

 #include <stdlib.h>

 #include <string.h>

 #include <math.h>

 int main(int argc, char **argv)

 {

     unsigned long long data = , i = , max = ;

     if (argc < )

     {

         printf("argument error\n");

         return -;

     }

     if (strlen(argv[]) > )

     {

         printf("out of range\n");

         return -;

     }

     data = atoll(argv[]);

     if (9223372036854775807ULL == data && ('' == argv[][] || '' == argv[][]))

     {

         printf("out of range\n");

         return -;

     }

     printf("data : %llu\n", data);

     while ()

     {

         max = sqrt(data);

         for (i = ; i <= max; i++)

         {

             if ( == (data % i))

             {

                 data = data / i;

                 printf("%llu * ", i);

                 fflush(stdout);

                 break;

             }

         }

         if (i > max)

         {

             printf("%llu", data);

             break;

         }

     }

     printf("\n");

     return ;

 }