Q: What are the prime factors of the number 77,800,330?

 A: 2, 5, 17, 29, 43, 367

Why are those the prime factors of the number 77,800,330?

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 77,800,330

77,800,330
Factor Arrows
238,900,165
Factor Arrows
57,780,033
Factor Arrows
17457,649
Factor Arrows
2915,781
Factor Arrows
43367

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, 17, 29, 43, 367

We can check our work by multiplying all of the prime factors together: 2 x 5 x 17 x 29 x 43 x 367 = 77,800,330

This can also be written as 21 x 51 x 171 x 291 x 431 x 3671 = 77,800,330

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


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