done, quite easy

#include <stdio.h>

//https://otvet.mail.ru/question/218027254

int main()
{
    int count,flag;//2,2,3
    double i,n = 28;

    count = flag = 0;

    for(i=2;i<=n;i++)
    {
        if(i==n&&!flag)
        {
            printf("sorry,it's not\n");
        }
        else if(!fmod(n,i))
        {
            printf("%c %d  ",(!flag)?' ':'*',(int)i);
            n/=i--;
            flag++;
            count++;
        }
        else if(n<10)//if cifra
        {
           printf("* %d\nhurray,it dividable!\n",(int)n);
           i=n;
           count++;
        }

    }
    printf("dividers count is-%d\n",count);

    return 0;
}