Q: What are the prime factors of the number 21,554,848?

 A: 2, 7, 41, 2347

Why are those the prime factors of the number 21,554,848?

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 21,554,848

21,554,848
Factor Arrows
210,777,424
Factor Arrows
25,388,712
Factor Arrows
22,694,356
Factor Arrows
21,347,178
Factor Arrows
2673,589
Factor Arrows
796,227
Factor Arrows
412,347

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, 7, 41, 2347

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 41 x 2,347 = 21,554,848

This can also be written as 25 x 71 x 411 x 2,3471 = 21,554,848

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


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