Q: What are the prime factors of the number 108,360,420?

 A: 2, 3, 5, 7, 19, 37, 367

Why are those the prime factors of the number 108,360,420?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 108,360,420

108,360,420
Factor Arrows
254,180,210
Factor Arrows
227,090,105
Factor Arrows
39,030,035
Factor Arrows
51,806,007
Factor Arrows
7258,001
Factor Arrows
1913,579
Factor Arrows
37367

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 5, 7, 19, 37, 367

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 7 x 19 x 37 x 367 = 108,360,420

This can also be written as 22 x 31 x 51 x 71 x 191 x 371 x 3671 = 108,360,420

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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