Q: What are the prime factors of the number 243,078?

 A: 2, 3, 11, 29, 127

Why are those the prime factors of the number 243,078?

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 243,078

243,078
Factor Arrows
2121,539
Factor Arrows
340,513
Factor Arrows
113,683
Factor Arrows
29127

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, 11, 29, 127

We can check our work by multiplying all of the prime factors together: 2 x 3 x 11 x 29 x 127 = 243,078

This can also be written as 21 x 31 x 111 x 291 x 1271 = 243,078

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


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