Q: What are the prime factors of the number 31,265,024?

 A: 2, 7, 73, 239

Why are those the prime factors of the number 31,265,024?

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 31,265,024

31,265,024
Factor Arrows
215,632,512
Factor Arrows
27,816,256
Factor Arrows
23,908,128
Factor Arrows
21,954,064
Factor Arrows
2977,032
Factor Arrows
2488,516
Factor Arrows
2244,258
Factor Arrows
2122,129
Factor Arrows
717,447
Factor Arrows
73239

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, 73, 239

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 7 x 73 x 239 = 31,265,024

This can also be written as 28 x 71 x 731 x 2391 = 31,265,024

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


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