Q: What are the prime factors of the number 77,250?

 A: 2, 3, 5, 103

Why are those the prime factors of the number 77,250?

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 77,250

77,250
Factor Arrows
238,625
Factor Arrows
312,875
Factor Arrows
52,575
Factor Arrows
5515
Factor Arrows
5103

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, 5, 103

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 5 x 5 x 103 = 77,250

This can also be written as 21 x 31 x 53 x 1031 = 77,250

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


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