Q: What are the prime factors of the number 213,422,400?

 A: 2, 3, 5, 14821

Why are those the prime factors of the number 213,422,400?

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 213,422,400

213,422,400
Factor Arrows
2106,711,200
Factor Arrows
253,355,600
Factor Arrows
226,677,800
Factor Arrows
213,338,900
Factor Arrows
26,669,450
Factor Arrows
23,334,725
Factor Arrows
31,111,575
Factor Arrows
3370,525
Factor Arrows
574,105
Factor Arrows
514,821

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, 14821

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 5 x 5 x 14,821 = 213,422,400

This can also be written as 26 x 32 x 52 x 14,8211 = 213,422,400

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


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