Q: What are the prime factors of the number 22,388,736?

 A: 2, 3, 911

Why are those the prime factors of the number 22,388,736?

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 22,388,736

22,388,736
Factor Arrows
211,194,368
Factor Arrows
25,597,184
Factor Arrows
22,798,592
Factor Arrows
21,399,296
Factor Arrows
2699,648
Factor Arrows
2349,824
Factor Arrows
2174,912
Factor Arrows
287,456
Factor Arrows
243,728
Factor Arrows
221,864
Factor Arrows
210,932
Factor Arrows
25,466
Factor Arrows
22,733
Factor Arrows
3911

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, 911

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 2 x 2 x 2 x 3 x 911 = 22,388,736

This can also be written as 213 x 31 x 9111 = 22,388,736

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


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