Q: What are the prime factors of the number 303,576?

 A: 2, 3, 7, 13, 139

Why are those the prime factors of the number 303,576?

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 303,576

303,576
Factor Arrows
2151,788
Factor Arrows
275,894
Factor Arrows
237,947
Factor Arrows
312,649
Factor Arrows
71,807
Factor Arrows
13139

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, 7, 13, 139

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 7 x 13 x 139 = 303,576

This can also be written as 23 x 31 x 71 x 131 x 1391 = 303,576

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


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