Q: What are the prime factors of the number 340,800?

 A: 2, 3, 5, 71

Why are those the prime factors of the number 340,800?

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 340,800

340,800
Factor Arrows
2170,400
Factor Arrows
285,200
Factor Arrows
242,600
Factor Arrows
221,300
Factor Arrows
210,650
Factor Arrows
25,325
Factor Arrows
31,775
Factor Arrows
5355
Factor Arrows
571

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, 71

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 3 x 5 x 5 x 71 = 340,800

This can also be written as 26 x 31 x 52 x 711 = 340,800

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


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