Q: What are the prime factors of the number 105,254,016?

 A: 2, 3, 7, 39157

Why are those the prime factors of the number 105,254,016?

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 105,254,016

105,254,016
Factor Arrows
252,627,008
Factor Arrows
226,313,504
Factor Arrows
213,156,752
Factor Arrows
26,578,376
Factor Arrows
23,289,188
Factor Arrows
21,644,594
Factor Arrows
2822,297
Factor Arrows
3274,099
Factor Arrows
739,157

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, 7, 39157

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 7 x 39,157 = 105,254,016

This can also be written as 27 x 31 x 71 x 39,1571 = 105,254,016

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


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