Q: What is the prime factorization of the number 3,196,032?

 A:
  • The prime factors are: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 7 x 29 x 41
    • or also written as { 2, 2, 2, 2, 2, 2, 2, 3, 7, 29, 41 }
  • Written in exponential form: 27 x 31 x 71 x 291 x 411

Why is the prime factorization of 3,196,032 written as 27 x 31 x 71 x 291 x 411?

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 3,196,032

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 3,196,032 by 2

3,196,032 ÷ 2 = 1,598,016 - No remainder! 2 is one of the factors!
1,598,016 ÷ 2 = 799,008 - No remainder! 2 is one of the factors!
799,008 ÷ 2 = 399,504 - No remainder! 2 is one of the factors!
399,504 ÷ 2 = 199,752 - No remainder! 2 is one of the factors!
199,752 ÷ 2 = 99,876 - No remainder! 2 is one of the factors!
99,876 ÷ 2 = 49,938 - No remainder! 2 is one of the factors!
49,938 ÷ 2 = 24,969 - No remainder! 2 is one of the factors!
24,969 ÷ 2 = 12,484.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
24,969 ÷ 3 = 8,323 - No remainder! 3 is one of the factors!
8,323 ÷ 3 = 2,774.3333 - There is a remainder. We can't divide by 3 evenly anymore. Let's try the next prime number
8,323 ÷ 5 = 1,664.6 - This has a remainder. 5 is not a factor.
8,323 ÷ 7 = 1,189 - No remainder! 7 is one of the factors!
1,189 ÷ 7 = 169.8571 - There is a remainder. We can't divide by 7 evenly anymore. Let's try the next prime number
1,189 ÷ 11 = 108.0909 - This has a remainder. 11 is not a factor.
1,189 ÷ 13 = 91.4615 - This has a remainder. 13 is not a factor.
1,189 ÷ 17 = 69.9412 - This has a remainder. 17 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
1,189 ÷ 29 = 41 - No remainder! 29 is one of the factors!
41 ÷ 29 = 1.4138 - There is a remainder. We can't divide by 29 evenly anymore. Let's try the next prime number
41 ÷ 31 = 1.3226 - This has a remainder. 31 is not a factor.
41 ÷ 37 = 1.1081 - This has a remainder. 37 is not a factor.
41 ÷ 41 = 1 - No remainder! 41 is one of the factors!

The orange divisor(s) above are the prime factors of the number 3,196,032. If we put all of it together we have the factors 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 7 x 29 x 41 = 3,196,032. It can also be written in exponential form as 27 x 31 x 71 x 291 x 411.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 3,196,032.

3,196,032
Factor Arrows
21,598,016
Factor Arrows
2799,008
Factor Arrows
2399,504
Factor Arrows
2199,752
Factor Arrows
299,876
Factor Arrows
249,938
Factor Arrows
224,969
Factor Arrows
38,323
Factor Arrows
71,189
Factor Arrows
2941

More Prime Factorization Examples

3,196,0303,196,0313,196,0333,196,034
21 x 51 x 591 x 5,41713,196,03113,196,033121 x 171 x 231 x 611 x 671

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