A:
Positive:
1 x 7218534713 x 555271943 x 1678729263 x 274469491 x 147017559 x 1291333419 x 211136383 x 11309
Negative:
-1 x -72185347-13 x -5552719-43 x -1678729-263 x -274469-491 x -147017-559 x -129133-3419 x -21113-6383 x -11309
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 72,185,347, 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 | 72,185,347 | |
| -1 | -72,185,347 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,185,347.
Example:
1 x 72,185,347 = 72,185,347
and
-1 x -72,185,347 = 72,185,347
Notice both answers equal 72,185,347
With that explanation out of the way, let's continue. Next, we take the number 72,185,347 and divide it by 2:
72,185,347 ÷ 2 = 36,092,673.5
If the quotient is a whole number, then 2 and 36,092,673.5 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 | 72,185,347 | |
| -1 | -72,185,347 |
Now, we try dividing 72,185,347 by 3:
72,185,347 ÷ 3 = 24,061,782.3333
If the quotient is a whole number, then 3 and 24,061,782.3333 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 | 72,185,347 | |
| -1 | -72,185,347 |
Let's try dividing by 4:
72,185,347 ÷ 4 = 18,046,336.75
If the quotient is a whole number, then 4 and 18,046,336.75 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 | 72,185,347 | |
| -1 | 72,185,347 |
If you did it right, you will end up with this table:
| 1 | 13 | 43 | 263 | 491 | 559 | 3,419 | 6,383 | 11,309 | 21,113 | 129,133 | 147,017 | 274,469 | 1,678,729 | 5,552,719 | 72,185,347 |
| -1 | -13 | -43 | -263 | -491 | -559 | -3,419 | -6,383 | -11,309 | -21,113 | -129,133 | -147,017 | -274,469 | -1,678,729 | -5,552,719 | -72,185,347 |
Here are some more numbers to try:
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