Q: What are the prime factors of the number 23,661,120?

 A: 2, 3, 5, 7, 503

Why are those the prime factors of the number 23,661,120?

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 23,661,120

23,661,120
Factor Arrows
211,830,560
Factor Arrows
25,915,280
Factor Arrows
22,957,640
Factor Arrows
21,478,820
Factor Arrows
2739,410
Factor Arrows
2369,705
Factor Arrows
3123,235
Factor Arrows
524,647
Factor Arrows
73,521
Factor Arrows
7503

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, 3, 5, 7, 503

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 3 x 5 x 7 x 7 x 503 = 23,661,120

This can also be written as 26 x 31 x 51 x 72 x 5031 = 23,661,120

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


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