Q: What are the prime factors of the number 285,172,288?

 A: 2, 101, 157, 281

Why are those the prime factors of the number 285,172,288?

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 285,172,288

285,172,288
Factor Arrows
2142,586,144
Factor Arrows
271,293,072
Factor Arrows
235,646,536
Factor Arrows
217,823,268
Factor Arrows
28,911,634
Factor Arrows
24,455,817
Factor Arrows
10144,117
Factor Arrows
157281

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, 101, 157, 281

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 101 x 157 x 281 = 285,172,288

This can also be written as 26 x 1011 x 1571 x 2811 = 285,172,288

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


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