Q: What are the prime factors of the number 5,129,280?

 A: 2, 3, 5, 13, 137

Why are those the prime factors of the number 5,129,280?

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 5,129,280

5,129,280
Factor Arrows
22,564,640
Factor Arrows
21,282,320
Factor Arrows
2641,160
Factor Arrows
2320,580
Factor Arrows
2160,290
Factor Arrows
280,145
Factor Arrows
326,715
Factor Arrows
38,905
Factor Arrows
51,781
Factor Arrows
13137

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, 3, 5, 13, 137

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 3 x 3 x 5 x 13 x 137 = 5,129,280

This can also be written as 26 x 32 x 51 x 131 x 1371 = 5,129,280

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


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