Q: What are the prime factors of the number 276,431,778?

 A: 2, 3, 7, 43, 5669

Why are those the prime factors of the number 276,431,778?

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 276,431,778

276,431,778
Factor Arrows
2138,215,889
Factor Arrows
346,071,963
Factor Arrows
315,357,321
Factor Arrows
35,119,107
Factor Arrows
31,706,369
Factor Arrows
7243,767
Factor Arrows
435,669

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, 43, 5669

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 7 x 43 x 5,669 = 276,431,778

This can also be written as 21 x 34 x 71 x 431 x 5,6691 = 276,431,778

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


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