Q: What are the prime factors of the number 161,247,300?

 A: 2, 3, 5, 19, 28289

Why are those the prime factors of the number 161,247,300?

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 161,247,300

161,247,300
Factor Arrows
280,623,650
Factor Arrows
240,311,825
Factor Arrows
313,437,275
Factor Arrows
52,687,455
Factor Arrows
5537,491
Factor Arrows
1928,289

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, 19, 28289

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 5 x 19 x 28,289 = 161,247,300

This can also be written as 22 x 31 x 52 x 191 x 28,2891 = 161,247,300

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


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