A:
Positive:
1 x 38975581711 x 3543234737 x 1053394167 x 5817251407 x 957631737 x 5288412479 x 15722314293 x 27269
Negative:
-1 x -389755817-11 x -35432347-37 x -10533941-67 x -5817251-407 x -957631-737 x -528841-2479 x -157223-14293 x -27269
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 389,755,817, 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 | 389,755,817 | |
| -1 | -389,755,817 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 389,755,817.
Example:
1 x 389,755,817 = 389,755,817
and
-1 x -389,755,817 = 389,755,817
Notice both answers equal 389,755,817
With that explanation out of the way, let's continue. Next, we take the number 389,755,817 and divide it by 2:
389,755,817 ÷ 2 = 194,877,908.5
If the quotient is a whole number, then 2 and 194,877,908.5 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 | 389,755,817 | |
| -1 | -389,755,817 |
Now, we try dividing 389,755,817 by 3:
389,755,817 ÷ 3 = 129,918,605.6667
If the quotient is a whole number, then 3 and 129,918,605.6667 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 | 389,755,817 | |
| -1 | -389,755,817 |
Let's try dividing by 4:
389,755,817 ÷ 4 = 97,438,954.25
If the quotient is a whole number, then 4 and 97,438,954.25 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 | 389,755,817 | |
| -1 | 389,755,817 |
If you did it right, you will end up with this table:
| 1 | 11 | 37 | 67 | 407 | 737 | 2,479 | 14,293 | 27,269 | 157,223 | 528,841 | 957,631 | 5,817,251 | 10,533,941 | 35,432,347 | 389,755,817 |
| -1 | -11 | -37 | -67 | -407 | -737 | -2,479 | -14,293 | -27,269 | -157,223 | -528,841 | -957,631 | -5,817,251 | -10,533,941 | -35,432,347 | -389,755,817 |
Here are some more numbers to try:
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