Q: What are the prime factors of the number 77,512,000?

 A: 2, 5, 9689

Why are those the prime factors of the number 77,512,000?

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 77,512,000

77,512,000
Factor Arrows
238,756,000
Factor Arrows
219,378,000
Factor Arrows
29,689,000
Factor Arrows
24,844,500
Factor Arrows
22,422,250
Factor Arrows
21,211,125
Factor Arrows
5242,225
Factor Arrows
548,445
Factor Arrows
59,689

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, 9689

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 5 x 5 x 5 x 9,689 = 77,512,000

This can also be written as 26 x 53 x 9,6891 = 77,512,000

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


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