Q: What are the prime factors of the number 23,180,742?

 A: 2, 3, 13, 1223

Why are those the prime factors of the number 23,180,742?

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 23,180,742

23,180,742
Factor Arrows
211,590,371
Factor Arrows
33,863,457
Factor Arrows
31,287,819
Factor Arrows
3429,273
Factor Arrows
3143,091
Factor Arrows
347,697
Factor Arrows
315,899
Factor Arrows
131,223

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, 13, 1223

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 13 x 1,223 = 23,180,742

This can also be written as 21 x 36 x 131 x 1,2231 = 23,180,742

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


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