Q: What are the prime factors of the number 72,042,525?

 A: 3, 5, 29, 61, 181

Why are those the prime factors of the number 72,042,525?

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 72,042,525

72,042,525
Factor Arrows
324,014,175
Factor Arrows
38,004,725
Factor Arrows
51,600,945
Factor Arrows
5320,189
Factor Arrows
2911,041
Factor Arrows
61181

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:

3, 5, 29, 61, 181

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 5 x 29 x 61 x 181 = 72,042,525

This can also be written as 32 x 52 x 291 x 611 x 1811 = 72,042,525

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


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