Q: What are the prime factors of the number 72,445,472?

 A: 2, 11, 277, 743

Why are those the prime factors of the number 72,445,472?

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 72,445,472

72,445,472
Factor Arrows
236,222,736
Factor Arrows
218,111,368
Factor Arrows
29,055,684
Factor Arrows
24,527,842
Factor Arrows
22,263,921
Factor Arrows
11205,811
Factor Arrows
277743

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, 11, 277, 743

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 11 x 277 x 743 = 72,445,472

This can also be written as 25 x 111 x 2771 x 7431 = 72,445,472

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


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