求质因子个数的方法

/*求质因子的个数 */ 
      #include <stdio.h>
       
       int main(void)
       {
           long x0,y0 ;
           long   k,total=0;
           int i,j,num=0 ;
           
           scanf("%d",&k);
          
           j= 2 ;
           
           while (1)
           {
                 if(k % j == 0)
                 {
                    printf("%d ",j);  
                     while(k % j == 0 && k != j)
                     k /= j ;
                     num ++ ;
                     if(k == j)
                     break ;
                 }
                 
                 j ++ ;
           }
           
 
           printf(" num=%ld ",num);
           system("pause");
           return 0 ;
       }