Q: What are the prime factors of the number 2,976,768?

 A: 2, 3, 17, 19

Why are those the prime factors of the number 2,976,768?

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 2,976,768

2,976,768
Factor Arrows
21,488,384
Factor Arrows
2744,192
Factor Arrows
2372,096
Factor Arrows
2186,048
Factor Arrows
293,024
Factor Arrows
246,512
Factor Arrows
223,256
Factor Arrows
211,628
Factor Arrows
25,814
Factor Arrows
22,907
Factor Arrows
3969
Factor Arrows
3323
Factor Arrows
1719

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, 17, 19

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 2 x 2 x 2 x 2 x 3 x 3 x 17 x 19 = 2,976,768

This can also be written as 210 x 32 x 171 x 191 = 2,976,768

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


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