A:
Positive:
1 x 16322153913 x 1255550317 x 9601267221 x 738559509 x 3206711451 x 1124896617 x 246678653 x 18863
Negative:
-1 x -163221539-13 x -12555503-17 x -9601267-221 x -738559-509 x -320671-1451 x -112489-6617 x -24667-8653 x -18863
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 163,221,539, 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 | 163,221,539 | |
| -1 | -163,221,539 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 163,221,539.
Example:
1 x 163,221,539 = 163,221,539
and
-1 x -163,221,539 = 163,221,539
Notice both answers equal 163,221,539
With that explanation out of the way, let's continue. Next, we take the number 163,221,539 and divide it by 2:
163,221,539 ÷ 2 = 81,610,769.5
If the quotient is a whole number, then 2 and 81,610,769.5 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 | 163,221,539 | |
| -1 | -163,221,539 |
Now, we try dividing 163,221,539 by 3:
163,221,539 ÷ 3 = 54,407,179.6667
If the quotient is a whole number, then 3 and 54,407,179.6667 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 | 163,221,539 | |
| -1 | -163,221,539 |
Let's try dividing by 4:
163,221,539 ÷ 4 = 40,805,384.75
If the quotient is a whole number, then 4 and 40,805,384.75 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 | 163,221,539 | |
| -1 | 163,221,539 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 221 | 509 | 1,451 | 6,617 | 8,653 | 18,863 | 24,667 | 112,489 | 320,671 | 738,559 | 9,601,267 | 12,555,503 | 163,221,539 |
| -1 | -13 | -17 | -221 | -509 | -1,451 | -6,617 | -8,653 | -18,863 | -24,667 | -112,489 | -320,671 | -738,559 | -9,601,267 | -12,555,503 | -163,221,539 |
Here are some more numbers to try:
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