Q: What are the prime factors of the number 1,916,736?

 A: 2, 3, 67, 149

Why are those the prime factors of the number 1,916,736?

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 1,916,736

1,916,736
Factor Arrows
2958,368
Factor Arrows
2479,184
Factor Arrows
2239,592
Factor Arrows
2119,796
Factor Arrows
259,898
Factor Arrows
229,949
Factor Arrows
39,983
Factor Arrows
67149

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, 67, 149

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 3 x 67 x 149 = 1,916,736

This can also be written as 26 x 31 x 671 x 1491 = 1,916,736

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


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