Q: What are the prime factors of the number 1,866,816?

 A: 2, 3, 7, 463

Why are those the prime factors of the number 1,866,816?

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 1,866,816

1,866,816
Factor Arrows
2933,408
Factor Arrows
2466,704
Factor Arrows
2233,352
Factor Arrows
2116,676
Factor Arrows
258,338
Factor Arrows
229,169
Factor Arrows
39,723
Factor Arrows
33,241
Factor Arrows
7463

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, 463

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 3 x 7 x 463 = 1,866,816

This can also be written as 26 x 32 x 71 x 4631 = 1,866,816

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


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