A:
Positive:
1 x 182720055 x 365440123 x 79443559 x 309695115 x 158887295 x 619391357 x 134652693 x 6785
Negative:
-1 x -18272005-5 x -3654401-23 x -794435-59 x -309695-115 x -158887-295 x -61939-1357 x -13465-2693 x -6785
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 18,272,005, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 18,272,005 | |
| -1 | -18,272,005 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,272,005.
Example:
1 x 18,272,005 = 18,272,005
and
-1 x -18,272,005 = 18,272,005
Notice both answers equal 18,272,005
With that explanation out of the way, let's continue. Next, we take the number 18,272,005 and divide it by 2:
18,272,005 ÷ 2 = 9,136,002.5
If the quotient is a whole number, then 2 and 9,136,002.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,272,005 | |
| -1 | -18,272,005 |
Now, we try dividing 18,272,005 by 3:
18,272,005 ÷ 3 = 6,090,668.3333
If the quotient is a whole number, then 3 and 6,090,668.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,272,005 | |
| -1 | -18,272,005 |
Let's try dividing by 4:
18,272,005 ÷ 4 = 4,568,001.25
If the quotient is a whole number, then 4 and 4,568,001.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,272,005 | |
| -1 | 18,272,005 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 59 | 115 | 295 | 1,357 | 2,693 | 6,785 | 13,465 | 61,939 | 158,887 | 309,695 | 794,435 | 3,654,401 | 18,272,005 |
| -1 | -5 | -23 | -59 | -115 | -295 | -1,357 | -2,693 | -6,785 | -13,465 | -61,939 | -158,887 | -309,695 | -794,435 | -3,654,401 | -18,272,005 |
Here are some more numbers to try:
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