Q: What are the prime factors of the number 348,840?

 A: 2, 3, 5, 17, 19

Why are those the prime factors of the number 348,840?

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 348,840

348,840
Factor Arrows
2174,420
Factor Arrows
287,210
Factor Arrows
243,605
Factor Arrows
314,535
Factor Arrows
34,845
Factor Arrows
31,615
Factor Arrows
5323
Factor Arrows
1719

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, 5, 17, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 5 x 17 x 19 = 348,840

This can also be written as 23 x 33 x 51 x 171 x 191 = 348,840

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


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