Use a factor tree.
Since prime numbers only have one prime factor (themselves), factor trees are unnecessary.
A factor tree of number is (I think) the numbers that multiply together to form a product. They are prime numbers, too.
59 is a prime number and as such has only two factors: 1 and 59 A factor tree doesn't make sense for prime numbers since it would only have one branch: the number itself.
11 is a prime number. Prime numbers don't have trees. Their only prime factor is themselves.
Every composite number has its own unique tree, so I guess the answer is all numbers have one tree. Perhaps you meant one branch or one factor. Prime numbers only have two factors, one of them is prime, so if you try to do a factor tree with a prime number, it stops the second you write the number down. And then there's one. One only has one factor, so we won't even bother with a tree. We'll call it a factor twig.
as you can obviously see the bottom of a factor tree would be the curious numbers of 2,2,3,5
NEVER! A factor tree is strictly division. Factors at the end of a factor tree should all be whole numbers.
103 is prime, so it's only factors are 1,103
The least common factor of any two numbers is one. You don't need a factor tree to tell you that.