The prime factors of 11 are simply 1 and 11. Because, you know, 11 is a prime number, it can't be divided evenly by any other number but itself. But let's be real, who needs more than one factor for a number that's basically just a magic trick?
That's it. That's all you get for 11. Don't @ me.
Check out the prime factors for 13, the real MVP (Most Valuable Prime)