A:
Positive:
1 x 2163136555 x 4326273137 x 5846315185 x 1169263359 x 6025451795 x 1205093257 x 6641513283 x 16285
Negative:
-1 x -216313655-5 x -43262731-37 x -5846315-185 x -1169263-359 x -602545-1795 x -120509-3257 x -66415-13283 x -16285
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 216,313,655, 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 | 216,313,655 | |
| -1 | -216,313,655 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 216,313,655.
Example:
1 x 216,313,655 = 216,313,655
and
-1 x -216,313,655 = 216,313,655
Notice both answers equal 216,313,655
With that explanation out of the way, let's continue. Next, we take the number 216,313,655 and divide it by 2:
216,313,655 ÷ 2 = 108,156,827.5
If the quotient is a whole number, then 2 and 108,156,827.5 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 | 216,313,655 | |
| -1 | -216,313,655 |
Now, we try dividing 216,313,655 by 3:
216,313,655 ÷ 3 = 72,104,551.6667
If the quotient is a whole number, then 3 and 72,104,551.6667 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 | 216,313,655 | |
| -1 | -216,313,655 |
Let's try dividing by 4:
216,313,655 ÷ 4 = 54,078,413.75
If the quotient is a whole number, then 4 and 54,078,413.75 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 | 216,313,655 | |
| -1 | 216,313,655 |
If you did it right, you will end up with this table:
| 1 | 5 | 37 | 185 | 359 | 1,795 | 3,257 | 13,283 | 16,285 | 66,415 | 120,509 | 602,545 | 1,169,263 | 5,846,315 | 43,262,731 | 216,313,655 |
| -1 | -5 | -37 | -185 | -359 | -1,795 | -3,257 | -13,283 | -16,285 | -66,415 | -120,509 | -602,545 | -1,169,263 | -5,846,315 | -43,262,731 | -216,313,655 |
Here are some more numbers to try:
Try the factor calculator