A:
Positive:
1 x 24502166317 x 1441303919 x 12895877317 x 772939323 x 7585812393 x 1023915389 x 454676023 x 40681
Negative:
-1 x -245021663-17 x -14413039-19 x -12895877-317 x -772939-323 x -758581-2393 x -102391-5389 x -45467-6023 x -40681
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 245,021,663, 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 | 245,021,663 | |
| -1 | -245,021,663 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 245,021,663.
Example:
1 x 245,021,663 = 245,021,663
and
-1 x -245,021,663 = 245,021,663
Notice both answers equal 245,021,663
With that explanation out of the way, let's continue. Next, we take the number 245,021,663 and divide it by 2:
245,021,663 ÷ 2 = 122,510,831.5
If the quotient is a whole number, then 2 and 122,510,831.5 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 | 245,021,663 | |
| -1 | -245,021,663 |
Now, we try dividing 245,021,663 by 3:
245,021,663 ÷ 3 = 81,673,887.6667
If the quotient is a whole number, then 3 and 81,673,887.6667 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 | 245,021,663 | |
| -1 | -245,021,663 |
Let's try dividing by 4:
245,021,663 ÷ 4 = 61,255,415.75
If the quotient is a whole number, then 4 and 61,255,415.75 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 | 245,021,663 | |
| -1 | 245,021,663 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 317 | 323 | 2,393 | 5,389 | 6,023 | 40,681 | 45,467 | 102,391 | 758,581 | 772,939 | 12,895,877 | 14,413,039 | 245,021,663 |
| -1 | -17 | -19 | -317 | -323 | -2,393 | -5,389 | -6,023 | -40,681 | -45,467 | -102,391 | -758,581 | -772,939 | -12,895,877 | -14,413,039 | -245,021,663 |
Here are some more numbers to try:
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