Q: What are the prime factors of the number 542,354,400?

 A: 2, 3, 5, 7, 17, 211

Why are those the prime factors of the number 542,354,400?

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 542,354,400

542,354,400
Factor Arrows
2271,177,200
Factor Arrows
2135,588,600
Factor Arrows
267,794,300
Factor Arrows
233,897,150
Factor Arrows
216,948,575
Factor Arrows
35,649,525
Factor Arrows
31,883,175
Factor Arrows
3627,725
Factor Arrows
5125,545
Factor Arrows
525,109
Factor Arrows
73,587
Factor Arrows
17211

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, 7, 17, 211

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 5 x 7 x 17 x 211 = 542,354,400

This can also be written as 25 x 33 x 52 x 71 x 171 x 2111 = 542,354,400

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


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