Q: What are the prime factors of the number 322,100,100?

 A: 2, 3, 5, 7, 29, 41, 43

Why are those the prime factors of the number 322,100,100?

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 322,100,100

322,100,100
Factor Arrows
2161,050,050
Factor Arrows
280,525,025
Factor Arrows
326,841,675
Factor Arrows
38,947,225
Factor Arrows
51,789,445
Factor Arrows
5357,889
Factor Arrows
751,127
Factor Arrows
291,763
Factor Arrows
4143

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, 7, 29, 41, 43

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 5 x 7 x 29 x 41 x 43 = 322,100,100

This can also be written as 22 x 32 x 52 x 71 x 291 x 411 x 431 = 322,100,100

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


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