Q: What are the prime factors of the number 2,134,440?

 A: 2, 3, 5, 7, 11

Why are those the prime factors of the number 2,134,440?

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 2,134,440

2,134,440
Factor Arrows
21,067,220
Factor Arrows
2533,610
Factor Arrows
2266,805
Factor Arrows
388,935
Factor Arrows
329,645
Factor Arrows
55,929
Factor Arrows
7847
Factor Arrows
7121
Factor Arrows
1111

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, 7, 11

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 7 x 7 x 11 x 11 = 2,134,440

This can also be written as 23 x 32 x 51 x 72 x 112 = 2,134,440

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


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