Q: What are the prime factors of the number 72,072,448?

 A: 2, 7, 37, 1087

Why are those the prime factors of the number 72,072,448?

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 72,072,448

72,072,448
Factor Arrows
236,036,224
Factor Arrows
218,018,112
Factor Arrows
29,009,056
Factor Arrows
24,504,528
Factor Arrows
22,252,264
Factor Arrows
21,126,132
Factor Arrows
2563,066
Factor Arrows
2281,533
Factor Arrows
740,219
Factor Arrows
371,087

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, 7, 37, 1087

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 7 x 37 x 1,087 = 72,072,448

This can also be written as 28 x 71 x 371 x 1,0871 = 72,072,448

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


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