Q: What are the prime factors of the number 21,334,104?

 A: 2, 3, 11, 41, 73

Why are those the prime factors of the number 21,334,104?

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 21,334,104

21,334,104
Factor Arrows
210,667,052
Factor Arrows
25,333,526
Factor Arrows
22,666,763
Factor Arrows
3888,921
Factor Arrows
3296,307
Factor Arrows
398,769
Factor Arrows
332,923
Factor Arrows
112,993
Factor Arrows
4173

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, 41, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 11 x 41 x 73 = 21,334,104

This can also be written as 23 x 34 x 111 x 411 x 731 = 21,334,104

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


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