A:
Positive:
1 x 2165016077 x 3092880141 x 5280527287 x 754361353 x 6133192137 x 1013112471 x 8761714473 x 14959
Negative:
-1 x -216501607-7 x -30928801-41 x -5280527-287 x -754361-353 x -613319-2137 x -101311-2471 x -87617-14473 x -14959
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 216,501,607, 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 | 216,501,607 | |
| -1 | -216,501,607 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 216,501,607.
Example:
1 x 216,501,607 = 216,501,607
and
-1 x -216,501,607 = 216,501,607
Notice both answers equal 216,501,607
With that explanation out of the way, let's continue. Next, we take the number 216,501,607 and divide it by 2:
216,501,607 ÷ 2 = 108,250,803.5
If the quotient is a whole number, then 2 and 108,250,803.5 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 | 216,501,607 | |
| -1 | -216,501,607 |
Now, we try dividing 216,501,607 by 3:
216,501,607 ÷ 3 = 72,167,202.3333
If the quotient is a whole number, then 3 and 72,167,202.3333 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 | 216,501,607 | |
| -1 | -216,501,607 |
Let's try dividing by 4:
216,501,607 ÷ 4 = 54,125,401.75
If the quotient is a whole number, then 4 and 54,125,401.75 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 | 216,501,607 | |
| -1 | 216,501,607 |
If you did it right, you will end up with this table:
| 1 | 7 | 41 | 287 | 353 | 2,137 | 2,471 | 14,473 | 14,959 | 87,617 | 101,311 | 613,319 | 754,361 | 5,280,527 | 30,928,801 | 216,501,607 |
| -1 | -7 | -41 | -287 | -353 | -2,137 | -2,471 | -14,473 | -14,959 | -87,617 | -101,311 | -613,319 | -754,361 | -5,280,527 | -30,928,801 | -216,501,607 |
Here are some more numbers to try:
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