Q: What are the prime factors of the number 307,146?

 A: 2, 3, 7, 71, 103

Why are those the prime factors of the number 307,146?

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 307,146

307,146
Factor Arrows
2153,573
Factor Arrows
351,191
Factor Arrows
77,313
Factor Arrows
71103

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, 7, 71, 103

We can check our work by multiplying all of the prime factors together: 2 x 3 x 7 x 71 x 103 = 307,146

This can also be written as 21 x 31 x 71 x 711 x 1031 = 307,146

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


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