Q: What are the prime factors of the number 354,240?

 A: 2, 3, 5, 41

Why are those the prime factors of the number 354,240?

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 354,240

354,240
Factor Arrows
2177,120
Factor Arrows
288,560
Factor Arrows
244,280
Factor Arrows
222,140
Factor Arrows
211,070
Factor Arrows
25,535
Factor Arrows
31,845
Factor Arrows
3615
Factor Arrows
3205
Factor Arrows
541

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, 41

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 41 = 354,240

This can also be written as 26 x 33 x 51 x 411 = 354,240

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


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