Q: What are the prime factors of the number 312,305,400?

 A: 2, 3, 5, 11, 15773

Why are those the prime factors of the number 312,305,400?

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 312,305,400

312,305,400
Factor Arrows
2156,152,700
Factor Arrows
278,076,350
Factor Arrows
239,038,175
Factor Arrows
313,012,725
Factor Arrows
34,337,575
Factor Arrows
5867,515
Factor Arrows
5173,503
Factor Arrows
1115,773

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, 11, 15773

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 5 x 11 x 15,773 = 312,305,400

This can also be written as 23 x 32 x 52 x 111 x 15,7731 = 312,305,400

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


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