Q: What are the prime factors of the number 20,021,888?

 A: 2, 156421

Why are those the prime factors of the number 20,021,888?

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 20,021,888

20,021,888
Factor Arrows
210,010,944
Factor Arrows
25,005,472
Factor Arrows
22,502,736
Factor Arrows
21,251,368
Factor Arrows
2625,684
Factor Arrows
2312,842
Factor Arrows
2156,421

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, 156421

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 2 x 156,421 = 20,021,888

This can also be written as 27 x 156,4211 = 20,021,888

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


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