Q: What are the prime factors of the number 21,516,348?

 A: 2, 3, 7, 256147

Why are those the prime factors of the number 21,516,348?

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 21,516,348

21,516,348
Factor Arrows
210,758,174
Factor Arrows
25,379,087
Factor Arrows
31,793,029
Factor Arrows
7256,147

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, 7, 256147

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 7 x 256,147 = 21,516,348

This can also be written as 22 x 31 x 71 x 256,1471 = 21,516,348

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


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