Q: What are the prime factors of the number 12,195,456?

 A: 2, 3, 7, 13, 349

Why are those the prime factors of the number 12,195,456?

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 12,195,456

12,195,456
Factor Arrows
26,097,728
Factor Arrows
23,048,864
Factor Arrows
21,524,432
Factor Arrows
2762,216
Factor Arrows
2381,108
Factor Arrows
2190,554
Factor Arrows
295,277
Factor Arrows
331,759
Factor Arrows
74,537
Factor Arrows
13349

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, 7, 13, 349

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 3 x 7 x 13 x 349 = 12,195,456

This can also be written as 27 x 31 x 71 x 131 x 3491 = 12,195,456

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


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