Q: What are the prime factors of the number 625,431,120?

 A: 2, 3, 5, 331, 7873

Why are those the prime factors of the number 625,431,120?

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 625,431,120

625,431,120
Factor Arrows
2312,715,560
Factor Arrows
2156,357,780
Factor Arrows
278,178,890
Factor Arrows
239,089,445
Factor Arrows
313,029,815
Factor Arrows
52,605,963
Factor Arrows
3317,873

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, 331, 7873

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 331 x 7,873 = 625,431,120

This can also be written as 24 x 31 x 51 x 3311 x 7,8731 = 625,431,120

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


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