FACTOR TREE OF 21
Factorization tree of 21 is shown below.
(21 = 3 × 7)
The prime factors of 21 are 3 and 7
Prime factorization of 21 is as following.
Without Exponents: 21 = 3 × 7
With Exponents: 21 = 3 × 7
In addition to the upside-down division method, in order to produce the prime factorization of a composite number, we can use factor trees.
At every step, we find two factors of a composite number at one of the ends of the tree. We repeat the process until all ends are prime.