Q: What are the prime factors of the number 13,257,530?

 A: 2, 5, 11, 13, 73, 127

Why are those the prime factors of the number 13,257,530?

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 13,257,530

13,257,530
Factor Arrows
26,628,765
Factor Arrows
51,325,753
Factor Arrows
11120,523
Factor Arrows
139,271
Factor Arrows
73127

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, 11, 13, 73, 127

We can check our work by multiplying all of the prime factors together: 2 x 5 x 11 x 13 x 73 x 127 = 13,257,530

This can also be written as 21 x 51 x 111 x 131 x 731 x 1271 = 13,257,530

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


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