Q: What are the prime factors of the number 74,358?

 A: 2, 3, 17

Why are those the prime factors of the number 74,358?

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 74,358

74,358
Factor Arrows
237,179
Factor Arrows
312,393
Factor Arrows
34,131
Factor Arrows
31,377
Factor Arrows
3459
Factor Arrows
3153
Factor Arrows
351
Factor Arrows
317

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, 17

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 17 = 74,358

This can also be written as 21 x 37 x 171 = 74,358

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


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