Q: What are the prime factors of the number 261,443,130?

 A: 2, 3, 5, 13, 97, 6911

Why are those the prime factors of the number 261,443,130?

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 261,443,130

261,443,130
Factor Arrows
2130,721,565
Factor Arrows
343,573,855
Factor Arrows
58,714,771
Factor Arrows
13670,367
Factor Arrows
976,911

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, 5, 13, 97, 6911

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 13 x 97 x 6,911 = 261,443,130

This can also be written as 21 x 31 x 51 x 131 x 971 x 6,9111 = 261,443,130

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


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