Q: What are the prime factors of the number 13,546,240?

 A: 2, 5, 19, 557

Why are those the prime factors of the number 13,546,240?

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 13,546,240

13,546,240
Factor Arrows
26,773,120
Factor Arrows
23,386,560
Factor Arrows
21,693,280
Factor Arrows
2846,640
Factor Arrows
2423,320
Factor Arrows
2211,660
Factor Arrows
2105,830
Factor Arrows
252,915
Factor Arrows
510,583
Factor Arrows
19557

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, 19, 557

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 5 x 19 x 557 = 13,546,240

This can also be written as 28 x 51 x 191 x 5571 = 13,546,240

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


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