A:
Positive:
1 x 2166140655 x 43322813109 x 1987285239 x 906335545 x 3974571195 x 1812671663 x 1302558315 x 26051
Negative:
-1 x -216614065-5 x -43322813-109 x -1987285-239 x -906335-545 x -397457-1195 x -181267-1663 x -130255-8315 x -26051
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 216,614,065, 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 | 216,614,065 | |
| -1 | -216,614,065 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 216,614,065.
Example:
1 x 216,614,065 = 216,614,065
and
-1 x -216,614,065 = 216,614,065
Notice both answers equal 216,614,065
With that explanation out of the way, let's continue. Next, we take the number 216,614,065 and divide it by 2:
216,614,065 ÷ 2 = 108,307,032.5
If the quotient is a whole number, then 2 and 108,307,032.5 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 | 216,614,065 | |
| -1 | -216,614,065 |
Now, we try dividing 216,614,065 by 3:
216,614,065 ÷ 3 = 72,204,688.3333
If the quotient is a whole number, then 3 and 72,204,688.3333 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 | 216,614,065 | |
| -1 | -216,614,065 |
Let's try dividing by 4:
216,614,065 ÷ 4 = 54,153,516.25
If the quotient is a whole number, then 4 and 54,153,516.25 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 | 216,614,065 | |
| -1 | 216,614,065 |
If you did it right, you will end up with this table:
| 1 | 5 | 109 | 239 | 545 | 1,195 | 1,663 | 8,315 | 26,051 | 130,255 | 181,267 | 397,457 | 906,335 | 1,987,285 | 43,322,813 | 216,614,065 |
| -1 | -5 | -109 | -239 | -545 | -1,195 | -1,663 | -8,315 | -26,051 | -130,255 | -181,267 | -397,457 | -906,335 | -1,987,285 | -43,322,813 | -216,614,065 |
Here are some more numbers to try:
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