Q: What are the prime factors of the number 32,718,528?

 A: 2, 3, 43, 1321

Why are those the prime factors of the number 32,718,528?

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 32,718,528

32,718,528
Factor Arrows
216,359,264
Factor Arrows
28,179,632
Factor Arrows
24,089,816
Factor Arrows
22,044,908
Factor Arrows
21,022,454
Factor Arrows
2511,227
Factor Arrows
3170,409
Factor Arrows
356,803
Factor Arrows
431,321

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, 43, 1321

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 3 x 43 x 1,321 = 32,718,528

This can also be written as 26 x 32 x 431 x 1,3211 = 32,718,528

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


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