Q: What are the prime factors of the number 545,221,044?

 A: 2, 3, 653, 859

Why are those the prime factors of the number 545,221,044?

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 545,221,044

545,221,044
Factor Arrows
2272,610,522
Factor Arrows
2136,305,261
Factor Arrows
345,435,087
Factor Arrows
315,145,029
Factor Arrows
35,048,343
Factor Arrows
31,682,781
Factor Arrows
3560,927
Factor Arrows
653859

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, 653, 859

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 3 x 653 x 859 = 545,221,044

This can also be written as 22 x 35 x 6531 x 8591 = 545,221,044

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


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