Q: What is the prime factorization of the number 122,221,032?

 A:
  • The prime factors are: 2 x 2 x 2 x 3 x 139 x 36,637
    • or also written as { 2, 2, 2, 3, 139, 36,637 }
  • Written in exponential form: 23 x 31 x 1391 x 36,6371

Why is the prime factorization of 122,221,032 written as 23 x 31 x 1391 x 36,6371?

What is prime factorization?

Prime factorization or prime factor decomposition is the process of finding which prime numbers can be multiplied together to make the original number.

Finding the prime factors of 122,221,032

To find the prime factors, you start by dividing the number by the first prime number, which is 2. If there is not a remainder, meaning you can divide evenly, then 2 is a factor of the number. Continue dividing by 2 until you cannot divide evenly anymore. Write down how many 2's you were able to divide by evenly. Now try dividing by the next prime factor, which is 3. The goal is to get to a quotient of 1.

If it doesn't make sense yet, let's try it...

Here are the first several prime factors: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29...

Let's start by dividing 122,221,032 by 2

122,221,032 ÷ 2 = 61,110,516 - No remainder! 2 is one of the factors!
61,110,516 ÷ 2 = 30,555,258 - No remainder! 2 is one of the factors!
30,555,258 ÷ 2 = 15,277,629 - No remainder! 2 is one of the factors!
15,277,629 ÷ 2 = 7,638,814.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
15,277,629 ÷ 3 = 5,092,543 - No remainder! 3 is one of the factors!
5,092,543 ÷ 3 = 1,697,514.3333 - There is a remainder. We can't divide by 3 evenly anymore. Let's try the next prime number
5,092,543 ÷ 5 = 1,018,508.6 - This has a remainder. 5 is not a factor.
5,092,543 ÷ 7 = 727,506.1429 - This has a remainder. 7 is not a factor.
5,092,543 ÷ 11 = 462,958.4545 - This has a remainder. 11 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
5,092,543 ÷ 139 = 36,637 - No remainder! 139 is one of the factors!
36,637 ÷ 139 = 263.5755 - There is a remainder. We can't divide by 139 evenly anymore. Let's try the next prime number
36,637 ÷ 149 = 245.8859 - This has a remainder. 149 is not a factor.
36,637 ÷ 151 = 242.6291 - This has a remainder. 151 is not a factor.
36,637 ÷ 157 = 233.3567 - This has a remainder. 157 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
36,637 ÷ 36,637 = 1 - No remainder! 36,637 is one of the factors!

The orange divisor(s) above are the prime factors of the number 122,221,032. If we put all of it together we have the factors 2 x 2 x 2 x 3 x 139 x 36,637 = 122,221,032. It can also be written in exponential form as 23 x 31 x 1391 x 36,6371.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 122,221,032.

122,221,032
Factor Arrows
261,110,516
Factor Arrows
230,555,258
Factor Arrows
215,277,629
Factor Arrows
35,092,543
Factor Arrows
13936,637

More Prime Factorization Examples

122,221,030122,221,031122,221,033122,221,034
21 x 51 x 892 x 1,54315871 x 208,2131111 x 711 x 156,493121 x 131 x 191 x 231 x 311 x 3471

Try the factor calculator

Explore more about the number 122,221,032:


Ask a Question