Q: What are the prime factors of the number 16,245,000?

 A: 2, 3, 5, 19

Why are those the prime factors of the number 16,245,000?

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 16,245,000

16,245,000
Factor Arrows
28,122,500
Factor Arrows
24,061,250
Factor Arrows
22,030,625
Factor Arrows
3676,875
Factor Arrows
3225,625
Factor Arrows
545,125
Factor Arrows
59,025
Factor Arrows
51,805
Factor Arrows
5361
Factor Arrows
1919

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, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 5 x 5 x 5 x 19 x 19 = 16,245,000

This can also be written as 23 x 32 x 54 x 192 = 16,245,000

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


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