Q: What are the prime factors of the number 72,771,008?

 A: 2, 37, 79, 389

Why are those the prime factors of the number 72,771,008?

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 72,771,008

72,771,008
Factor Arrows
236,385,504
Factor Arrows
218,192,752
Factor Arrows
29,096,376
Factor Arrows
24,548,188
Factor Arrows
22,274,094
Factor Arrows
21,137,047
Factor Arrows
3730,731
Factor Arrows
79389

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, 37, 79, 389

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 37 x 79 x 389 = 72,771,008

This can also be written as 26 x 371 x 791 x 3891 = 72,771,008

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


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