Q: What are the prime factors of the number 21,050,304?

 A: 2, 3, 11, 9967

Why are those the prime factors of the number 21,050,304?

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 21,050,304

21,050,304
Factor Arrows
210,525,152
Factor Arrows
25,262,576
Factor Arrows
22,631,288
Factor Arrows
21,315,644
Factor Arrows
2657,822
Factor Arrows
2328,911
Factor Arrows
3109,637
Factor Arrows
119,967

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, 11, 9967

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 3 x 11 x 9,967 = 21,050,304

This can also be written as 26 x 31 x 111 x 9,9671 = 21,050,304

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


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