Q: What are the prime factors of the number 163,108,160?

 A: 2, 5, 19, 139, 193

Why are those the prime factors of the number 163,108,160?

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 163,108,160

163,108,160
Factor Arrows
281,554,080
Factor Arrows
240,777,040
Factor Arrows
220,388,520
Factor Arrows
210,194,260
Factor Arrows
25,097,130
Factor Arrows
22,548,565
Factor Arrows
5509,713
Factor Arrows
1926,827
Factor Arrows
139193

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, 5, 19, 139, 193

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 5 x 19 x 139 x 193 = 163,108,160

This can also be written as 26 x 51 x 191 x 1391 x 1931 = 163,108,160

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


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