Q: What are the prime factors of the number 4,179,680?

 A: 2, 5, 151, 173

Why are those the prime factors of the number 4,179,680?

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 4,179,680

4,179,680
Factor Arrows
22,089,840
Factor Arrows
21,044,920
Factor Arrows
2522,460
Factor Arrows
2261,230
Factor Arrows
2130,615
Factor Arrows
526,123
Factor Arrows
151173

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, 151, 173

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 151 x 173 = 4,179,680

This can also be written as 25 x 51 x 1511 x 1731 = 4,179,680

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


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