Q: What are the prime factors of the number 255,530,505?

 A: 3, 5, 101, 151, 1117

Why are those the prime factors of the number 255,530,505?

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 255,530,505

255,530,505
Factor Arrows
385,176,835
Factor Arrows
517,035,367
Factor Arrows
101168,667
Factor Arrows
1511,117

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:

3, 5, 101, 151, 1117

We can check our work by multiplying all of the prime factors together: 3 x 5 x 101 x 151 x 1,117 = 255,530,505

This can also be written as 31 x 51 x 1011 x 1511 x 1,1171 = 255,530,505

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


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