Q: What are the prime factors of the number 140,331,464?

 A: 2, 7, 13, 17, 23, 29

Why are those the prime factors of the number 140,331,464?

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 140,331,464

140,331,464
Factor Arrows
270,165,732
Factor Arrows
235,082,866
Factor Arrows
217,541,433
Factor Arrows
72,505,919
Factor Arrows
13192,763
Factor Arrows
1711,339
Factor Arrows
17667
Factor Arrows
2329

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, 7, 13, 17, 23, 29

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 7 x 13 x 17 x 17 x 23 x 29 = 140,331,464

This can also be written as 23 x 71 x 131 x 172 x 231 x 291 = 140,331,464

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


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