Q: What are the prime factors of the number 69,760?

 A: 2, 5, 109

Why are those the prime factors of the number 69,760?

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 69,760

69,760
Factor Arrows
234,880
Factor Arrows
217,440
Factor Arrows
28,720
Factor Arrows
24,360
Factor Arrows
22,180
Factor Arrows
21,090
Factor Arrows
2545
Factor Arrows
5109

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, 109

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 5 x 109 = 69,760

This can also be written as 27 x 51 x 1091 = 69,760

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


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