Q: What are the prime factors of the number 72,413,760?

 A: 2, 3, 5, 75431

Why are those the prime factors of the number 72,413,760?

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 72,413,760

72,413,760
Factor Arrows
236,206,880
Factor Arrows
218,103,440
Factor Arrows
29,051,720
Factor Arrows
24,525,860
Factor Arrows
22,262,930
Factor Arrows
21,131,465
Factor Arrows
3377,155
Factor Arrows
575,431

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, 75431

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 3 x 5 x 75,431 = 72,413,760

This can also be written as 26 x 31 x 51 x 75,4311 = 72,413,760

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


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