Q: What are the prime factors of the number 22,121,344?

 A: 2, 7, 3527

Why are those the prime factors of the number 22,121,344?

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 22,121,344

22,121,344
Factor Arrows
211,060,672
Factor Arrows
25,530,336
Factor Arrows
22,765,168
Factor Arrows
21,382,584
Factor Arrows
2691,292
Factor Arrows
2345,646
Factor Arrows
2172,823
Factor Arrows
724,689
Factor Arrows
73,527

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, 7, 3527

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 7 x 7 x 3,527 = 22,121,344

This can also be written as 27 x 72 x 3,5271 = 22,121,344

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


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