Q: What are the prime factors of the number 36,021,920?

 A: 2, 5, 11, 97, 211

Why are those the prime factors of the number 36,021,920?

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 36,021,920

36,021,920
Factor Arrows
218,010,960
Factor Arrows
29,005,480
Factor Arrows
24,502,740
Factor Arrows
22,251,370
Factor Arrows
21,125,685
Factor Arrows
5225,137
Factor Arrows
1120,467
Factor Arrows
97211

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, 11, 97, 211

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 11 x 97 x 211 = 36,021,920

This can also be written as 25 x 51 x 111 x 971 x 2111 = 36,021,920

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


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