Q: What are the prime factors of the number 23,000,320?

 A: 2, 5, 7, 17, 151

Why are those the prime factors of the number 23,000,320?

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 23,000,320

23,000,320
Factor Arrows
211,500,160
Factor Arrows
25,750,080
Factor Arrows
22,875,040
Factor Arrows
21,437,520
Factor Arrows
2718,760
Factor Arrows
2359,380
Factor Arrows
2179,690
Factor Arrows
289,845
Factor Arrows
517,969
Factor Arrows
72,567
Factor Arrows
17151

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, 5, 7, 17, 151

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 5 x 7 x 17 x 151 = 23,000,320

This can also be written as 28 x 51 x 71 x 171 x 1511 = 23,000,320

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


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