#include < stdio.h > int main(){ int num,i=1,j,k; printf("\nEnter a number:"); scanf("%d",&num); while(i<=num){ k=0; if(num%i==0){ j=1; while(j<=i){ if(i%j==0) k++; j++; } if(k==2) printf("\n%d is a prime factor",i); } i++; } return 0; }