The purpose of a factor tree is to notate the process of finding the prime factorization. If a number is already prime, a factor tree is not necessary.
The purpose of a factor tree is to divide a number into prime factors. 1 is not a prime number.
13 is a prime number so it doesn't have a factor tree.
There is no factor tree nor factors of 57 as it is a prime number.
2 is a prime number; no factor tree.
The factor tree for the number 956 would be written out as 2*2*239. To find the factor tree you can use a factor tree calculator to get the answer you need.
19 is prime. No tree.
A factor tree is a way of displaying the prime factors of a given number.
83 is a prime number and doesn't have a factor tree since its only prime factor is itself.
23 is already prime; no tree.