Q: What are the prime factors of the number 33,423,390?

 A: 2, 3, 5, 7, 11, 13, 53

Why are those the prime factors of the number 33,423,390?

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 33,423,390

33,423,390
Factor Arrows
216,711,695
Factor Arrows
35,570,565
Factor Arrows
31,856,855
Factor Arrows
5371,371
Factor Arrows
753,053
Factor Arrows
77,579
Factor Arrows
11689
Factor Arrows
1353

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, 7, 11, 13, 53

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 7 x 7 x 11 x 13 x 53 = 33,423,390

This can also be written as 21 x 32 x 51 x 72 x 111 x 131 x 531 = 33,423,390

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


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