Q: What are the prime factors of the number 722,151,424?

 A: 2, 23, 15331

Why are those the prime factors of the number 722,151,424?

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 722,151,424

722,151,424
Factor Arrows
2361,075,712
Factor Arrows
2180,537,856
Factor Arrows
290,268,928
Factor Arrows
245,134,464
Factor Arrows
222,567,232
Factor Arrows
211,283,616
Factor Arrows
25,641,808
Factor Arrows
22,820,904
Factor Arrows
21,410,452
Factor Arrows
2705,226
Factor Arrows
2352,613
Factor Arrows
2315,331

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, 23, 15331

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 23 x 15,331 = 722,151,424

This can also be written as 211 x 231 x 15,3311 = 722,151,424

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


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