Q: What are the prime factors of the number 77,813,925?

 A: 3, 5, 7, 103, 1439

Why are those the prime factors of the number 77,813,925?

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 77,813,925

77,813,925
Factor Arrows
325,937,975
Factor Arrows
55,187,595
Factor Arrows
51,037,519
Factor Arrows
7148,217
Factor Arrows
1031,439

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:

3, 5, 7, 103, 1439

We can check our work by multiplying all of the prime factors together: 3 x 5 x 5 x 7 x 103 x 1,439 = 77,813,925

This can also be written as 31 x 52 x 71 x 1031 x 1,4391 = 77,813,925

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


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