Q: What are the prime factors of the number 1,536,768?

 A: 2, 3, 23, 29

Why are those the prime factors of the number 1,536,768?

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 1,536,768

1,536,768
Factor Arrows
2768,384
Factor Arrows
2384,192
Factor Arrows
2192,096
Factor Arrows
296,048
Factor Arrows
248,024
Factor Arrows
224,012
Factor Arrows
212,006
Factor Arrows
26,003
Factor Arrows
32,001
Factor Arrows
3667
Factor Arrows
2329

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, 23, 29

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 3 x 3 x 23 x 29 = 1,536,768

This can also be written as 28 x 32 x 231 x 291 = 1,536,768

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


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