Q: What are the prime factors of the number 100,823,250?

 A: 2, 3, 5, 11, 101

Why are those the prime factors of the number 100,823,250?

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 100,823,250

100,823,250
Factor Arrows
250,411,625
Factor Arrows
316,803,875
Factor Arrows
53,360,775
Factor Arrows
5672,155
Factor Arrows
5134,431
Factor Arrows
1112,221
Factor Arrows
111,111
Factor Arrows
11101

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, 11, 101

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 5 x 5 x 11 x 11 x 11 x 101 = 100,823,250

This can also be written as 21 x 31 x 53 x 113 x 1011 = 100,823,250

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


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