Q: What are the prime factors of the number 105,570,000?

 A: 2, 3, 5, 17, 23

Why are those the prime factors of the number 105,570,000?

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 105,570,000

105,570,000
Factor Arrows
252,785,000
Factor Arrows
226,392,500
Factor Arrows
213,196,250
Factor Arrows
26,598,125
Factor Arrows
32,199,375
Factor Arrows
3733,125
Factor Arrows
3244,375
Factor Arrows
548,875
Factor Arrows
59,775
Factor Arrows
51,955
Factor Arrows
5391
Factor Arrows
1723

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, 17, 23

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 5 x 5 x 5 x 17 x 23 = 105,570,000

This can also be written as 24 x 33 x 54 x 171 x 231 = 105,570,000

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


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