Q: What are the prime factors of the number 42,050,646?

 A: 2, 3, 11, 43, 449

Why are those the prime factors of the number 42,050,646?

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 42,050,646

42,050,646
Factor Arrows
221,025,323
Factor Arrows
37,008,441
Factor Arrows
32,336,147
Factor Arrows
11212,377
Factor Arrows
1119,307
Factor Arrows
43449

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, 11, 43, 449

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 11 x 11 x 43 x 449 = 42,050,646

This can also be written as 21 x 32 x 112 x 431 x 4491 = 42,050,646

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


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