Q: What are the prime factors of the number 312,131,200?

 A: 2, 5, 103, 947

Why are those the prime factors of the number 312,131,200?

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 312,131,200

312,131,200
Factor Arrows
2156,065,600
Factor Arrows
278,032,800
Factor Arrows
239,016,400
Factor Arrows
219,508,200
Factor Arrows
29,754,100
Factor Arrows
24,877,050
Factor Arrows
22,438,525
Factor Arrows
5487,705
Factor Arrows
597,541
Factor Arrows
103947

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, 5, 103, 947

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 5 x 5 x 103 x 947 = 312,131,200

This can also be written as 27 x 52 x 1031 x 9471 = 312,131,200

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


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