Q: What are the prime factors of the number 13,420,288?

 A: 2, 7, 7489

Why are those the prime factors of the number 13,420,288?

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 13,420,288

13,420,288
Factor Arrows
26,710,144
Factor Arrows
23,355,072
Factor Arrows
21,677,536
Factor Arrows
2838,768
Factor Arrows
2419,384
Factor Arrows
2209,692
Factor Arrows
2104,846
Factor Arrows
252,423
Factor Arrows
77,489

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, 7489

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 7,489 = 13,420,288

This can also be written as 28 x 71 x 7,4891 = 13,420,288

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


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