Q: What are the prime factors of the number 338,470?

 A: 2, 5, 11, 17, 181

Why are those the prime factors of the number 338,470?

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 338,470

338,470
Factor Arrows
2169,235
Factor Arrows
533,847
Factor Arrows
113,077
Factor Arrows
17181

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, 5, 11, 17, 181

We can check our work by multiplying all of the prime factors together: 2 x 5 x 11 x 17 x 181 = 338,470

This can also be written as 21 x 51 x 111 x 171 x 1811 = 338,470

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


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