Q: What are the prime factors of the number 474,840?

 A: 2, 3, 5, 1319

Why are those the prime factors of the number 474,840?

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 474,840

474,840
Factor Arrows
2237,420
Factor Arrows
2118,710
Factor Arrows
259,355
Factor Arrows
319,785
Factor Arrows
36,595
Factor Arrows
51,319

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, 1319

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 1,319 = 474,840

This can also be written as 23 x 32 x 51 x 1,3191 = 474,840

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


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