程序代码：

#include <stdio.h>
int main (void)
{

 int a;

 printf("Please insert an integer: ");

 scanf("%d", &a);

 printf("The factor: ");

 for(int i = 1; i <= a; i++)
  if((a % i) == 0)
   printf("%d ", i);

 printf("\n");

 return 0;
}