Q: What are the prime factors of the number 276,742,620?

 A: 2, 3, 5, 7, 11, 41, 487

Why are those the prime factors of the number 276,742,620?

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 276,742,620

276,742,620
Factor Arrows
2138,371,310
Factor Arrows
269,185,655
Factor Arrows
323,061,885
Factor Arrows
37,687,295
Factor Arrows
51,537,459
Factor Arrows
7219,637
Factor Arrows
1119,967
Factor Arrows
41487

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, 7, 11, 41, 487

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 7 x 11 x 41 x 487 = 276,742,620

This can also be written as 22 x 32 x 51 x 71 x 111 x 411 x 4871 = 276,742,620

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


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