Q: What are the prime factors of the number 665,135,147?

Why are those the prime factors of the number 665,135,147?

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 665,135,147

	665,135,147
19		35,007,113
	431		81,223

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:

19, 431, 81223

We can check our work by multiplying all of the prime factors together: 19 x 431 x 81,223 = 665,135,147

This can also be written as 19¹ x 431¹ x 81,223¹ = 665,135,147

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

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