Q: What are the prime factors of the number 90,213,102?

 A: 2, 3, 7, 19, 53, 79

Why are those the prime factors of the number 90,213,102?

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 90,213,102

90,213,102
Factor Arrows
245,106,551
Factor Arrows
315,035,517
Factor Arrows
35,011,839
Factor Arrows
31,670,613
Factor Arrows
3556,871
Factor Arrows
779,553
Factor Arrows
194,187
Factor Arrows
5379

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, 7, 19, 53, 79

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 7 x 19 x 53 x 79 = 90,213,102

This can also be written as 21 x 34 x 71 x 191 x 531 x 791 = 90,213,102

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


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