Q: What are the prime factors of the number 79,662,240?

 A: 2, 3, 5, 7, 1129

Why are those the prime factors of the number 79,662,240?

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 79,662,240

79,662,240
Factor Arrows
239,831,120
Factor Arrows
219,915,560
Factor Arrows
29,957,780
Factor Arrows
24,978,890
Factor Arrows
22,489,445
Factor Arrows
3829,815
Factor Arrows
3276,605
Factor Arrows
555,321
Factor Arrows
77,903
Factor Arrows
71,129

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, 7, 1129

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 5 x 7 x 7 x 1,129 = 79,662,240

This can also be written as 25 x 32 x 51 x 72 x 1,1291 = 79,662,240

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


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