Q: What are the prime factors of the number 210,655,040?

 A: 2, 5, 181, 3637

Why are those the prime factors of the number 210,655,040?

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 210,655,040

210,655,040
Factor Arrows
2105,327,520
Factor Arrows
252,663,760
Factor Arrows
226,331,880
Factor Arrows
213,165,940
Factor Arrows
26,582,970
Factor Arrows
23,291,485
Factor Arrows
5658,297
Factor Arrows
1813,637

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, 181, 3637

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 181 x 3,637 = 210,655,040

This can also be written as 26 x 51 x 1811 x 3,6371 = 210,655,040

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


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