Q: What are the prime factors of the number 3,648,000?

 A: 2, 3, 5, 19

Why are those the prime factors of the number 3,648,000?

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 3,648,000

3,648,000
Factor Arrows
21,824,000
Factor Arrows
2912,000
Factor Arrows
2456,000
Factor Arrows
2228,000
Factor Arrows
2114,000
Factor Arrows
257,000
Factor Arrows
228,500
Factor Arrows
214,250
Factor Arrows
27,125
Factor Arrows
32,375
Factor Arrows
5475
Factor Arrows
595
Factor Arrows
519

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 2 x 2 x 2 x 2 x 2 x 2 x 3 x 5 x 5 x 5 x 19 = 3,648,000

This can also be written as 29 x 31 x 53 x 191 = 3,648,000

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


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