A:
Positive:
1 x 21513305323 x 935361147 x 457729971 x 30300431081 x 1990131633 x 1317412803 x 767513337 x 64469
Negative:
-1 x -215133053-23 x -9353611-47 x -4577299-71 x -3030043-1081 x -199013-1633 x -131741-2803 x -76751-3337 x -64469
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 215,133,053, 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 | 215,133,053 | |
| -1 | -215,133,053 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 215,133,053.
Example:
1 x 215,133,053 = 215,133,053
and
-1 x -215,133,053 = 215,133,053
Notice both answers equal 215,133,053
With that explanation out of the way, let's continue. Next, we take the number 215,133,053 and divide it by 2:
215,133,053 ÷ 2 = 107,566,526.5
If the quotient is a whole number, then 2 and 107,566,526.5 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 | 215,133,053 | |
| -1 | -215,133,053 |
Now, we try dividing 215,133,053 by 3:
215,133,053 ÷ 3 = 71,711,017.6667
If the quotient is a whole number, then 3 and 71,711,017.6667 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 | 215,133,053 | |
| -1 | -215,133,053 |
Let's try dividing by 4:
215,133,053 ÷ 4 = 53,783,263.25
If the quotient is a whole number, then 4 and 53,783,263.25 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 | 215,133,053 | |
| -1 | 215,133,053 |
If you did it right, you will end up with this table:
| 1 | 23 | 47 | 71 | 1,081 | 1,633 | 2,803 | 3,337 | 64,469 | 76,751 | 131,741 | 199,013 | 3,030,043 | 4,577,299 | 9,353,611 | 215,133,053 |
| -1 | -23 | -47 | -71 | -1,081 | -1,633 | -2,803 | -3,337 | -64,469 | -76,751 | -131,741 | -199,013 | -3,030,043 | -4,577,299 | -9,353,611 | -215,133,053 |
Here are some more numbers to try:
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