Q: What are the prime factors of the number 86,478,080?

 A: 2, 5, 13, 5197

Why are those the prime factors of the number 86,478,080?

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 86,478,080

86,478,080
Factor Arrows
243,239,040
Factor Arrows
221,619,520
Factor Arrows
210,809,760
Factor Arrows
25,404,880
Factor Arrows
22,702,440
Factor Arrows
21,351,220
Factor Arrows
2675,610
Factor Arrows
2337,805
Factor Arrows
567,561
Factor Arrows
135,197

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, 13, 5197

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 5 x 13 x 5,197 = 86,478,080

This can also be written as 28 x 51 x 131 x 5,1971 = 86,478,080

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


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