Q: What are the prime factors of the number 140,704?

 A: 2, 4397

Why are those the prime factors of the number 140,704?

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 140,704

140,704
Factor Arrows
270,352
Factor Arrows
235,176
Factor Arrows
217,588
Factor Arrows
28,794
Factor Arrows
24,397

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, 4397

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 4,397 = 140,704

This can also be written as 25 x 4,3971 = 140,704

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


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