Q: What are the prime factors of the number 32,130,000?

 A: 2, 3, 5, 7, 17

Why are those the prime factors of the number 32,130,000?

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 32,130,000

32,130,000
Factor Arrows
216,065,000
Factor Arrows
28,032,500
Factor Arrows
24,016,250
Factor Arrows
22,008,125
Factor Arrows
3669,375
Factor Arrows
3223,125
Factor Arrows
374,375
Factor Arrows
514,875
Factor Arrows
52,975
Factor Arrows
5595
Factor Arrows
5119
Factor Arrows
717

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, 17

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 5 x 5 x 5 x 7 x 17 = 32,130,000

This can also be written as 24 x 33 x 54 x 71 x 171 = 32,130,000

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


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