Q: What are the prime factors of the number 33,428,000?

 A: 2, 5, 61, 137

Why are those the prime factors of the number 33,428,000?

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 33,428,000

33,428,000
Factor Arrows
216,714,000
Factor Arrows
28,357,000
Factor Arrows
24,178,500
Factor Arrows
22,089,250
Factor Arrows
21,044,625
Factor Arrows
5208,925
Factor Arrows
541,785
Factor Arrows
58,357
Factor Arrows
61137

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, 61, 137

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 5 x 61 x 137 = 33,428,000

This can also be written as 25 x 53 x 611 x 1371 = 33,428,000

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


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