Q: What are the prime factors of the number 162,336,128?

 A: 2, 17, 61, 1223

Why are those the prime factors of the number 162,336,128?

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 162,336,128

162,336,128
Factor Arrows
281,168,064
Factor Arrows
240,584,032
Factor Arrows
220,292,016
Factor Arrows
210,146,008
Factor Arrows
25,073,004
Factor Arrows
22,536,502
Factor Arrows
21,268,251
Factor Arrows
1774,603
Factor Arrows
611,223

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, 17, 61, 1223

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 2 x 17 x 61 x 1,223 = 162,336,128

This can also be written as 27 x 171 x 611 x 1,2231 = 162,336,128

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


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