Q: What are the prime factors of the number 705,378,048?

 A: 2, 3, 431, 2131

Why are those the prime factors of the number 705,378,048?

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 705,378,048

705,378,048
Factor Arrows
2352,689,024
Factor Arrows
2176,344,512
Factor Arrows
288,172,256
Factor Arrows
244,086,128
Factor Arrows
222,043,064
Factor Arrows
211,021,532
Factor Arrows
25,510,766
Factor Arrows
22,755,383
Factor Arrows
3918,461
Factor Arrows
4312,131

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, 431, 2131

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 3 x 431 x 2,131 = 705,378,048

This can also be written as 28 x 31 x 4311 x 2,1311 = 705,378,048

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


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