Q: What are the prime factors of the number 15,372,000?

 A: 2, 3, 5, 7, 61

Why are those the prime factors of the number 15,372,000?

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 15,372,000

15,372,000
Factor Arrows
27,686,000
Factor Arrows
23,843,000
Factor Arrows
21,921,500
Factor Arrows
2960,750
Factor Arrows
2480,375
Factor Arrows
3160,125
Factor Arrows
353,375
Factor Arrows
510,675
Factor Arrows
52,135
Factor Arrows
5427
Factor Arrows
761

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, 61

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 5 x 5 x 5 x 7 x 61 = 15,372,000

This can also be written as 25 x 32 x 53 x 71 x 611 = 15,372,000

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


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