Q: What are the prime factors of the number 1,636,416?

 A: 2, 3, 947

Why are those the prime factors of the number 1,636,416?

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 1,636,416

1,636,416
Factor Arrows
2818,208
Factor Arrows
2409,104
Factor Arrows
2204,552
Factor Arrows
2102,276
Factor Arrows
251,138
Factor Arrows
225,569
Factor Arrows
38,523
Factor Arrows
32,841
Factor Arrows
3947

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, 947

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 3 x 947 = 1,636,416

This can also be written as 26 x 33 x 9471 = 1,636,416

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


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