Q: What are the prime factors of the number 163,245,240?

 A: 2, 3, 5, 151153

Why are those the prime factors of the number 163,245,240?

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 163,245,240

163,245,240
Factor Arrows
281,622,620
Factor Arrows
240,811,310
Factor Arrows
220,405,655
Factor Arrows
36,801,885
Factor Arrows
32,267,295
Factor Arrows
3755,765
Factor Arrows
5151,153

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, 151153

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 5 x 151,153 = 163,245,240

This can also be written as 23 x 33 x 51 x 151,1531 = 163,245,240

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


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