Q: What are the prime factors of the number 22,158,752?

 A: 2, 7, 11, 17, 23

Why are those the prime factors of the number 22,158,752?

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 22,158,752

22,158,752
Factor Arrows
211,079,376
Factor Arrows
25,539,688
Factor Arrows
22,769,844
Factor Arrows
21,384,922
Factor Arrows
2692,461
Factor Arrows
798,923
Factor Arrows
118,993
Factor Arrows
17529
Factor Arrows
2323

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, 11, 17, 23

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 11 x 17 x 23 x 23 = 22,158,752

This can also be written as 25 x 71 x 111 x 171 x 232 = 22,158,752

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


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