Q: What are the prime factors of the number 40,355,120?

 A: 2, 5, 13, 38803

Why are those the prime factors of the number 40,355,120?

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 40,355,120

40,355,120
Factor Arrows
220,177,560
Factor Arrows
210,088,780
Factor Arrows
25,044,390
Factor Arrows
22,522,195
Factor Arrows
5504,439
Factor Arrows
1338,803

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, 13, 38803

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 13 x 38,803 = 40,355,120

This can also be written as 24 x 51 x 131 x 38,8031 = 40,355,120

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


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