Q: What are the prime factors of the number 909,824?

 A: 2, 1777

Why are those the prime factors of the number 909,824?

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 909,824

909,824
Factor Arrows
2454,912
Factor Arrows
2227,456
Factor Arrows
2113,728
Factor Arrows
256,864
Factor Arrows
228,432
Factor Arrows
214,216
Factor Arrows
27,108
Factor Arrows
23,554
Factor Arrows
21,777

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, 1777

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 1,777 = 909,824

This can also be written as 29 x 1,7771 = 909,824

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


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