Q: What are the prime factors of the number 55,278,288?

 A: 2, 3, 13, 17, 193

Why are those the prime factors of the number 55,278,288?

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 55,278,288

55,278,288
Factor Arrows
227,639,144
Factor Arrows
213,819,572
Factor Arrows
26,909,786
Factor Arrows
23,454,893
Factor Arrows
31,151,631
Factor Arrows
3383,877
Factor Arrows
3127,959
Factor Arrows
342,653
Factor Arrows
133,281
Factor Arrows
17193

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, 13, 17, 193

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 13 x 17 x 193 = 55,278,288

This can also be written as 24 x 34 x 131 x 171 x 1931 = 55,278,288

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


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