Q: What are the prime factors of the number 2,643,648?

 A: 2, 3, 7, 281

Why are those the prime factors of the number 2,643,648?

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 2,643,648

2,643,648
Factor Arrows
21,321,824
Factor Arrows
2660,912
Factor Arrows
2330,456
Factor Arrows
2165,228
Factor Arrows
282,614
Factor Arrows
241,307
Factor Arrows
313,769
Factor Arrows
71,967
Factor Arrows
7281

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, 281

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 3 x 7 x 7 x 281 = 2,643,648

This can also be written as 26 x 31 x 72 x 2811 = 2,643,648

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


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