Q: What are the prime factors of the number 20,361,000?

 A: 2, 3, 5, 11, 617

Why are those the prime factors of the number 20,361,000?

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 20,361,000

20,361,000
Factor Arrows
210,180,500
Factor Arrows
25,090,250
Factor Arrows
22,545,125
Factor Arrows
3848,375
Factor Arrows
5169,675
Factor Arrows
533,935
Factor Arrows
56,787
Factor Arrows
11617

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, 11, 617

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 5 x 5 x 11 x 617 = 20,361,000

This can also be written as 23 x 31 x 53 x 111 x 6171 = 20,361,000

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


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