A:
Positive:
1 x 721633555 x 1443267111 x 656030555 x 131206167 x 1077065335 x 215413737 x 979153685 x 19583
Negative:
-1 x -72163355-5 x -14432671-11 x -6560305-55 x -1312061-67 x -1077065-335 x -215413-737 x -97915-3685 x -19583
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 72,163,355, 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 | 72,163,355 | |
| -1 | -72,163,355 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,163,355.
Example:
1 x 72,163,355 = 72,163,355
and
-1 x -72,163,355 = 72,163,355
Notice both answers equal 72,163,355
With that explanation out of the way, let's continue. Next, we take the number 72,163,355 and divide it by 2:
72,163,355 ÷ 2 = 36,081,677.5
If the quotient is a whole number, then 2 and 36,081,677.5 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 | 72,163,355 | |
| -1 | -72,163,355 |
Now, we try dividing 72,163,355 by 3:
72,163,355 ÷ 3 = 24,054,451.6667
If the quotient is a whole number, then 3 and 24,054,451.6667 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 | 72,163,355 | |
| -1 | -72,163,355 |
Let's try dividing by 4:
72,163,355 ÷ 4 = 18,040,838.75
If the quotient is a whole number, then 4 and 18,040,838.75 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 | 72,163,355 | |
| -1 | 72,163,355 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 67 | 335 | 737 | 3,685 | 19,583 | 97,915 | 215,413 | 1,077,065 | 1,312,061 | 6,560,305 | 14,432,671 | 72,163,355 |
| -1 | -5 | -11 | -55 | -67 | -335 | -737 | -3,685 | -19,583 | -97,915 | -215,413 | -1,077,065 | -1,312,061 | -6,560,305 | -14,432,671 | -72,163,355 |
Here are some more numbers to try:
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