Q: What are the prime factors of the number 86,336?

 A: 2, 19, 71

Why are those the prime factors of the number 86,336?

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 86,336

86,336
Factor Arrows
243,168
Factor Arrows
221,584
Factor Arrows
210,792
Factor Arrows
25,396
Factor Arrows
22,698
Factor Arrows
21,349
Factor Arrows
1971

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, 19, 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 19 x 71 = 86,336

This can also be written as 26 x 191 x 711 = 86,336

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


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