Q: What are the prime factors of the number 1,147,320?

 A: 2, 3, 5, 3187

Why are those the prime factors of the number 1,147,320?

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 1,147,320

1,147,320
Factor Arrows
2573,660
Factor Arrows
2286,830
Factor Arrows
2143,415
Factor Arrows
347,805
Factor Arrows
315,935
Factor Arrows
53,187

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, 3187

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 3,187 = 1,147,320

This can also be written as 23 x 32 x 51 x 3,1871 = 1,147,320

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


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