Q: What are the prime factors of the number 103,216,512?

 A: 2, 3, 7, 19, 43, 47

Why are those the prime factors of the number 103,216,512?

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 103,216,512

103,216,512
Factor Arrows
251,608,256
Factor Arrows
225,804,128
Factor Arrows
212,902,064
Factor Arrows
26,451,032
Factor Arrows
23,225,516
Factor Arrows
21,612,758
Factor Arrows
2806,379
Factor Arrows
3268,793
Factor Arrows
738,399
Factor Arrows
192,021
Factor Arrows
4347

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, 19, 43, 47

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 19 x 43 x 47 = 103,216,512

This can also be written as 27 x 31 x 71 x 191 x 431 x 471 = 103,216,512

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


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