Q: What are the prime factors of the number 802,720?

 A: 2, 5, 29, 173

Why are those the prime factors of the number 802,720?

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 802,720

802,720
Factor Arrows
2401,360
Factor Arrows
2200,680
Factor Arrows
2100,340
Factor Arrows
250,170
Factor Arrows
225,085
Factor Arrows
55,017
Factor Arrows
29173

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, 5, 29, 173

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 29 x 173 = 802,720

This can also be written as 25 x 51 x 291 x 1731 = 802,720

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


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