Q: What are the prime factors of the number 561,690?

 A: 2, 3, 5, 79

Why are those the prime factors of the number 561,690?

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 561,690

561,690
Factor Arrows
2280,845
Factor Arrows
393,615
Factor Arrows
331,205
Factor Arrows
56,241
Factor Arrows
7979

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, 79

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 79 x 79 = 561,690

This can also be written as 21 x 32 x 51 x 792 = 561,690

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


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