Q: What are the prime factors of the number 73,790,720?

 A: 2, 5, 57649

Why are those the prime factors of the number 73,790,720?

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 73,790,720

73,790,720
Factor Arrows
236,895,360
Factor Arrows
218,447,680
Factor Arrows
29,223,840
Factor Arrows
24,611,920
Factor Arrows
22,305,960
Factor Arrows
21,152,980
Factor Arrows
2576,490
Factor Arrows
2288,245
Factor Arrows
557,649

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, 57649

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 2 x 5 x 57,649 = 73,790,720

This can also be written as 28 x 51 x 57,6491 = 73,790,720

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


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