A:
Positive:
1 x 2162406055 x 432481217 x 3089151535 x 617830359 x 3665095295 x 733019413 x 5235852065 x 104717
Negative:
-1 x -216240605-5 x -43248121-7 x -30891515-35 x -6178303-59 x -3665095-295 x -733019-413 x -523585-2065 x -104717
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 216,240,605, 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 | 216,240,605 | |
| -1 | -216,240,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 216,240,605.
Example:
1 x 216,240,605 = 216,240,605
and
-1 x -216,240,605 = 216,240,605
Notice both answers equal 216,240,605
With that explanation out of the way, let's continue. Next, we take the number 216,240,605 and divide it by 2:
216,240,605 ÷ 2 = 108,120,302.5
If the quotient is a whole number, then 2 and 108,120,302.5 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 | 216,240,605 | |
| -1 | -216,240,605 |
Now, we try dividing 216,240,605 by 3:
216,240,605 ÷ 3 = 72,080,201.6667
If the quotient is a whole number, then 3 and 72,080,201.6667 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 | 216,240,605 | |
| -1 | -216,240,605 |
Let's try dividing by 4:
216,240,605 ÷ 4 = 54,060,151.25
If the quotient is a whole number, then 4 and 54,060,151.25 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 | 216,240,605 | |
| -1 | 216,240,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 59 | 295 | 413 | 2,065 | 104,717 | 523,585 | 733,019 | 3,665,095 | 6,178,303 | 30,891,515 | 43,248,121 | 216,240,605 |
| -1 | -5 | -7 | -35 | -59 | -295 | -413 | -2,065 | -104,717 | -523,585 | -733,019 | -3,665,095 | -6,178,303 | -30,891,515 | -43,248,121 | -216,240,605 |
Here are some more numbers to try:
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