Q: What are the prime factors of the number 311,222,100?

 A: 2, 3, 5, 7, 148201

Why are those the prime factors of the number 311,222,100?

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 311,222,100

311,222,100
Factor Arrows
2155,611,050
Factor Arrows
277,805,525
Factor Arrows
325,935,175
Factor Arrows
55,187,035
Factor Arrows
51,037,407
Factor Arrows
7148,201

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, 148201

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 5 x 7 x 148,201 = 311,222,100

This can also be written as 22 x 31 x 52 x 71 x 148,2011 = 311,222,100

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


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