Q: What are the prime factors of the number 2,781,504?

 A: 2, 3, 11, 439

Why are those the prime factors of the number 2,781,504?

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 2,781,504

2,781,504
Factor Arrows
21,390,752
Factor Arrows
2695,376
Factor Arrows
2347,688
Factor Arrows
2173,844
Factor Arrows
286,922
Factor Arrows
243,461
Factor Arrows
314,487
Factor Arrows
34,829
Factor Arrows
11439

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, 439

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 3 x 11 x 439 = 2,781,504

This can also be written as 26 x 32 x 111 x 4391 = 2,781,504

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


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