Q: What are the prime factors of the number 54,811,400?

 A: 2, 5, 7, 17, 47

Why are those the prime factors of the number 54,811,400?

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 54,811,400

54,811,400
Factor Arrows
227,405,700
Factor Arrows
213,702,850
Factor Arrows
26,851,425
Factor Arrows
51,370,285
Factor Arrows
5274,057
Factor Arrows
739,151
Factor Arrows
75,593
Factor Arrows
7799
Factor Arrows
1747

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, 5, 7, 17, 47

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 5 x 7 x 7 x 7 x 17 x 47 = 54,811,400

This can also be written as 23 x 52 x 73 x 171 x 471 = 54,811,400

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


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