Q: What are the prime factors of the number 20,548,350?

 A: 2, 3, 5, 31, 491

Why are those the prime factors of the number 20,548,350?

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 20,548,350

20,548,350
Factor Arrows
210,274,175
Factor Arrows
33,424,725
Factor Arrows
31,141,575
Factor Arrows
3380,525
Factor Arrows
576,105
Factor Arrows
515,221
Factor Arrows
31491

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, 5, 31, 491

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 5 x 31 x 491 = 20,548,350

This can also be written as 21 x 33 x 52 x 311 x 4911 = 20,548,350

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


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