Q: What are the prime factors of the number 77,192,880?

 A: 2, 3, 5, 181, 1777

Why are those the prime factors of the number 77,192,880?

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 77,192,880

77,192,880
Factor Arrows
238,596,440
Factor Arrows
219,298,220
Factor Arrows
29,649,110
Factor Arrows
24,824,555
Factor Arrows
31,608,185
Factor Arrows
5321,637
Factor Arrows
1811,777

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, 181, 1777

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 181 x 1,777 = 77,192,880

This can also be written as 24 x 31 x 51 x 1811 x 1,7771 = 77,192,880

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


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