Q: What are the prime factors of the number 79,403,648?

 A: 2, 31, 20011

Why are those the prime factors of the number 79,403,648?

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 79,403,648

79,403,648
Factor Arrows
239,701,824
Factor Arrows
219,850,912
Factor Arrows
29,925,456
Factor Arrows
24,962,728
Factor Arrows
22,481,364
Factor Arrows
21,240,682
Factor Arrows
2620,341
Factor Arrows
3120,011

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, 31, 20011

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 2 x 31 x 20,011 = 79,403,648

This can also be written as 27 x 311 x 20,0111 = 79,403,648

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


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