Q: What are the prime factors of the number 120,738,840?

 A: 2, 3, 5, 43, 23399

Why are those the prime factors of the number 120,738,840?

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 120,738,840

120,738,840
Factor Arrows
260,369,420
Factor Arrows
230,184,710
Factor Arrows
215,092,355
Factor Arrows
35,030,785
Factor Arrows
51,006,157
Factor Arrows
4323,399

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, 43, 23399

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 43 x 23,399 = 120,738,840

This can also be written as 23 x 31 x 51 x 431 x 23,3991 = 120,738,840

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


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