A:
Positive:
1 x 2430215697 x 3471736771 x 342283997 x 2505377497 x 488977679 x 3579115041 x 482096887 x 35287
Negative:
-1 x -243021569-7 x -34717367-71 x -3422839-97 x -2505377-497 x -488977-679 x -357911-5041 x -48209-6887 x -35287
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 243,021,569, 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 | 243,021,569 | |
| -1 | -243,021,569 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 243,021,569.
Example:
1 x 243,021,569 = 243,021,569
and
-1 x -243,021,569 = 243,021,569
Notice both answers equal 243,021,569
With that explanation out of the way, let's continue. Next, we take the number 243,021,569 and divide it by 2:
243,021,569 ÷ 2 = 121,510,784.5
If the quotient is a whole number, then 2 and 121,510,784.5 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 | 243,021,569 | |
| -1 | -243,021,569 |
Now, we try dividing 243,021,569 by 3:
243,021,569 ÷ 3 = 81,007,189.6667
If the quotient is a whole number, then 3 and 81,007,189.6667 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 | 243,021,569 | |
| -1 | -243,021,569 |
Let's try dividing by 4:
243,021,569 ÷ 4 = 60,755,392.25
If the quotient is a whole number, then 4 and 60,755,392.25 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 | 243,021,569 | |
| -1 | 243,021,569 |
If you did it right, you will end up with this table:
| 1 | 7 | 71 | 97 | 497 | 679 | 5,041 | 6,887 | 35,287 | 48,209 | 357,911 | 488,977 | 2,505,377 | 3,422,839 | 34,717,367 | 243,021,569 |
| -1 | -7 | -71 | -97 | -497 | -679 | -5,041 | -6,887 | -35,287 | -48,209 | -357,911 | -488,977 | -2,505,377 | -3,422,839 | -34,717,367 | -243,021,569 |
Here are some more numbers to try:
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