Q: What are the prime factors of the number 2,791,424?

 A: 2, 29, 47

Why are those the prime factors of the number 2,791,424?

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 2,791,424

2,791,424
Factor Arrows
21,395,712
Factor Arrows
2697,856
Factor Arrows
2348,928
Factor Arrows
2174,464
Factor Arrows
287,232
Factor Arrows
243,616
Factor Arrows
221,808
Factor Arrows
210,904
Factor Arrows
25,452
Factor Arrows
22,726
Factor Arrows
21,363
Factor Arrows
2947

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, 29, 47

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 29 x 47 = 2,791,424

This can also be written as 211 x 291 x 471 = 2,791,424

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


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