Q: What are the prime factors of the number 74,242,120?

 A: 2, 5, 19, 97687

Why are those the prime factors of the number 74,242,120?

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 74,242,120

74,242,120
Factor Arrows
237,121,060
Factor Arrows
218,560,530
Factor Arrows
29,280,265
Factor Arrows
51,856,053
Factor Arrows
1997,687

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, 5, 19, 97687

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 19 x 97,687 = 74,242,120

This can also be written as 23 x 51 x 191 x 97,6871 = 74,242,120

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


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