Q: What is the prime factorization of the number 2,024,260?

 A:
  • The prime factors are: 2 x 2 x 5 x 7 x 19 x 761
    • or also written as { 2, 2, 5, 7, 19, 761 }
  • Written in exponential form: 22 x 51 x 71 x 191 x 7611

Why is the prime factorization of 2,024,260 written as 22 x 51 x 71 x 191 x 7611?

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 2,024,260

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 2,024,260 by 2

2,024,260 ÷ 2 = 1,012,130 - No remainder! 2 is one of the factors!
1,012,130 ÷ 2 = 506,065 - No remainder! 2 is one of the factors!
506,065 ÷ 2 = 253,032.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
506,065 ÷ 3 = 168,688.3333 - This has a remainder. 3 is not a factor.
506,065 ÷ 5 = 101,213 - No remainder! 5 is one of the factors!
101,213 ÷ 5 = 20,242.6 - There is a remainder. We can't divide by 5 evenly anymore. Let's try the next prime number
101,213 ÷ 7 = 14,459 - No remainder! 7 is one of the factors!
14,459 ÷ 7 = 2,065.5714 - There is a remainder. We can't divide by 7 evenly anymore. Let's try the next prime number
14,459 ÷ 11 = 1,314.4545 - This has a remainder. 11 is not a factor.
14,459 ÷ 13 = 1,112.2308 - This has a remainder. 13 is not a factor.
14,459 ÷ 17 = 850.5294 - This has a remainder. 17 is not a factor.
14,459 ÷ 19 = 761 - No remainder! 19 is one of the factors!
761 ÷ 19 = 40.0526 - There is a remainder. We can't divide by 19 evenly anymore. Let's try the next prime number
761 ÷ 23 = 33.087 - This has a remainder. 23 is not a factor.
761 ÷ 29 = 26.2414 - This has a remainder. 29 is not a factor.
761 ÷ 31 = 24.5484 - This has a remainder. 31 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
761 ÷ 761 = 1 - No remainder! 761 is one of the factors!

The orange divisor(s) above are the prime factors of the number 2,024,260. If we put all of it together we have the factors 2 x 2 x 5 x 7 x 19 x 761 = 2,024,260. It can also be written in exponential form as 22 x 51 x 71 x 191 x 7611.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 2,024,260.

2,024,260
Factor Arrows
21,012,130
Factor Arrows
2506,065
Factor Arrows
5101,213
Factor Arrows
714,459
Factor Arrows
19761

More Prime Factorization Examples

2,024,2582,024,2592,024,2612,024,262
21 x 171 x 291 x 2,053131 x 1031 x 6,55112,024,261121 x 32 x 112,4591

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