Answer Posted / nitin garg

#include<stdio.h>
#include<conio.h>
#include<string.h>

int main()
{
int num,i,sum=1,flag=0;
printf("enter three digit no
");
scanf("%d",&num);

for(i=1;i<=num;i++)
{
sum=sum*2;
}
sum++;
printf("
%d",sum);

for(i=2;i<sum/2;i++)
{
if(sum%i==0)
flag=1;
}
if(flag==0)
printf("
number is prime");
printf("

factor is below:
");

for(i=1;i<=sum;i++)
{
if(sum%i==0)
printf("%d ",i);
}

getch();
return 0;
}

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