Q: What are the prime factors of the number 420,525,000?

 A: 2, 3, 5, 7, 89

Why are those the prime factors of the number 420,525,000?

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 420,525,000

420,525,000
Factor Arrows
2210,262,500
Factor Arrows
2105,131,250
Factor Arrows
252,565,625
Factor Arrows
317,521,875
Factor Arrows
35,840,625
Factor Arrows
31,946,875
Factor Arrows
5389,375
Factor Arrows
577,875
Factor Arrows
515,575
Factor Arrows
53,115
Factor Arrows
5623
Factor Arrows
789

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, 89

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 5 x 5 x 5 x 5 x 5 x 7 x 89 = 420,525,000

This can also be written as 23 x 33 x 55 x 71 x 891 = 420,525,000

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


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