Q: What are the prime factors of the number 772,120?

 A: 2, 5, 97, 199

Why are those the prime factors of the number 772,120?

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 772,120

772,120
Factor Arrows
2386,060
Factor Arrows
2193,030
Factor Arrows
296,515
Factor Arrows
519,303
Factor Arrows
97199

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, 97, 199

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 97 x 199 = 772,120

This can also be written as 23 x 51 x 971 x 1991 = 772,120

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


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