Q: What are the prime factors of the number 23,242,240?

 A: 2, 5, 7, 1297

Why are those the prime factors of the number 23,242,240?

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 23,242,240

23,242,240
Factor Arrows
211,621,120
Factor Arrows
25,810,560
Factor Arrows
22,905,280
Factor Arrows
21,452,640
Factor Arrows
2726,320
Factor Arrows
2363,160
Factor Arrows
2181,580
Factor Arrows
290,790
Factor Arrows
245,395
Factor Arrows
59,079
Factor Arrows
71,297

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, 1297

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 5 x 7 x 1,297 = 23,242,240

This can also be written as 29 x 51 x 71 x 1,2971 = 23,242,240

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


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