Q: What is the prime factorization of the number 10,201,020?

 A:
  • The prime factors are: 2 x 2 x 3 x 5 x 17 x 73 x 137
    • or also written as { 2, 2, 3, 5, 17, 73, 137 }
  • Written in exponential form: 22 x 31 x 51 x 171 x 731 x 1371

Why is the prime factorization of 10,201,020 written as 22 x 31 x 51 x 171 x 731 x 1371?

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 10,201,020

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 10,201,020 by 2

10,201,020 ÷ 2 = 5,100,510 - No remainder! 2 is one of the factors!
5,100,510 ÷ 2 = 2,550,255 - No remainder! 2 is one of the factors!
2,550,255 ÷ 2 = 1,275,127.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
2,550,255 ÷ 3 = 850,085 - No remainder! 3 is one of the factors!
850,085 ÷ 3 = 283,361.6667 - There is a remainder. We can't divide by 3 evenly anymore. Let's try the next prime number
850,085 ÷ 5 = 170,017 - No remainder! 5 is one of the factors!
170,017 ÷ 5 = 34,003.4 - There is a remainder. We can't divide by 5 evenly anymore. Let's try the next prime number
170,017 ÷ 7 = 24,288.1429 - This has a remainder. 7 is not a factor.
170,017 ÷ 11 = 15,456.0909 - This has a remainder. 11 is not a factor.
170,017 ÷ 13 = 13,078.2308 - This has a remainder. 13 is not a factor.
170,017 ÷ 17 = 10,001 - No remainder! 17 is one of the factors!
10,001 ÷ 17 = 588.2941 - There is a remainder. We can't divide by 17 evenly anymore. Let's try the next prime number
10,001 ÷ 19 = 526.3684 - This has a remainder. 19 is not a factor.
10,001 ÷ 23 = 434.8261 - This has a remainder. 23 is not a factor.
10,001 ÷ 29 = 344.8621 - This has a remainder. 29 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
10,001 ÷ 73 = 137 - No remainder! 73 is one of the factors!
137 ÷ 73 = 1.8767 - There is a remainder. We can't divide by 73 evenly anymore. Let's try the next prime number
137 ÷ 79 = 1.7342 - This has a remainder. 79 is not a factor.
137 ÷ 83 = 1.6506 - This has a remainder. 83 is not a factor.
137 ÷ 89 = 1.5393 - This has a remainder. 89 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
137 ÷ 137 = 1 - No remainder! 137 is one of the factors!

The orange divisor(s) above are the prime factors of the number 10,201,020. If we put all of it together we have the factors 2 x 2 x 3 x 5 x 17 x 73 x 137 = 10,201,020. It can also be written in exponential form as 22 x 31 x 51 x 171 x 731 x 1371.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 10,201,020.

10,201,020
Factor Arrows
25,100,510
Factor Arrows
22,550,255
Factor Arrows
3850,085
Factor Arrows
5170,017
Factor Arrows
1710,001
Factor Arrows
73137

More Prime Factorization Examples

10,201,01810,201,01910,201,02110,201,022
21 x 671 x 2691 x 2831431 x 237,2331471 x 1271 x 1,709121 x 131 x 392,3471

Try the factor calculator

Explore more about the number 10,201,020:


Ask a Question