A:
Positive:
1 x 186130155 x 372260389 x 209135151 x 123265277 x 67195445 x 41827755 x 246531385 x 13439
Negative:
-1 x -18613015-5 x -3722603-89 x -209135-151 x -123265-277 x -67195-445 x -41827-755 x -24653-1385 x -13439
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 18,613,015, 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 | 18,613,015 | |
| -1 | -18,613,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,613,015.
Example:
1 x 18,613,015 = 18,613,015
and
-1 x -18,613,015 = 18,613,015
Notice both answers equal 18,613,015
With that explanation out of the way, let's continue. Next, we take the number 18,613,015 and divide it by 2:
18,613,015 ÷ 2 = 9,306,507.5
If the quotient is a whole number, then 2 and 9,306,507.5 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 | 18,613,015 | |
| -1 | -18,613,015 |
Now, we try dividing 18,613,015 by 3:
18,613,015 ÷ 3 = 6,204,338.3333
If the quotient is a whole number, then 3 and 6,204,338.3333 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 | 18,613,015 | |
| -1 | -18,613,015 |
Let's try dividing by 4:
18,613,015 ÷ 4 = 4,653,253.75
If the quotient is a whole number, then 4 and 4,653,253.75 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 | 18,613,015 | |
| -1 | 18,613,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 89 | 151 | 277 | 445 | 755 | 1,385 | 13,439 | 24,653 | 41,827 | 67,195 | 123,265 | 209,135 | 3,722,603 | 18,613,015 |
| -1 | -5 | -89 | -151 | -277 | -445 | -755 | -1,385 | -13,439 | -24,653 | -41,827 | -67,195 | -123,265 | -209,135 | -3,722,603 | -18,613,015 |
Here are some more numbers to try:
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