Q: What are the prime factors of the number 84,207,760?

 A: 2, 5, 7, 13, 43, 269

Why are those the prime factors of the number 84,207,760?

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 84,207,760

84,207,760
Factor Arrows
242,103,880
Factor Arrows
221,051,940
Factor Arrows
210,525,970
Factor Arrows
25,262,985
Factor Arrows
51,052,597
Factor Arrows
7150,371
Factor Arrows
1311,567
Factor Arrows
43269

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, 7, 13, 43, 269

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 7 x 13 x 43 x 269 = 84,207,760

This can also be written as 24 x 51 x 71 x 131 x 431 x 2691 = 84,207,760

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


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