Q: What are the prime factors of the number 722,151,240?

 A: 2, 3, 5, 19, 23, 47, 293

Why are those the prime factors of the number 722,151,240?

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 722,151,240

722,151,240
Factor Arrows
2361,075,620
Factor Arrows
2180,537,810
Factor Arrows
290,268,905
Factor Arrows
330,089,635
Factor Arrows
56,017,927
Factor Arrows
19316,733
Factor Arrows
2313,771
Factor Arrows
47293

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, 5, 19, 23, 47, 293

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 19 x 23 x 47 x 293 = 722,151,240

This can also be written as 23 x 31 x 51 x 191 x 231 x 471 x 2931 = 722,151,240

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


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