Why does a simple C program consumes a lot of disk space?

Question

I've noticed that the size of a simple C program that prints "hello world":

#include <stdio.h>
int main()
{
    printf("hello world");
}

is approximately 8kB. I thought that it might be because of the include, then I've generated a simpler program:

int main()
{
    int x=1+13;
    return x;
}

But again the size of the compiled program was ~8kB.

Why is that so large? If a machine instruction is 8B then there are about 1k instructions, but I don't see any reason why such simple code will result in such many instructions.