A:
Positive:
1 x 206414655 x 412829313 x 158780523 x 89745565 x 317561115 x 179491299 x 690351495 x 13807
Negative:
-1 x -20641465-5 x -4128293-13 x -1587805-23 x -897455-65 x -317561-115 x -179491-299 x -69035-1495 x -13807
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 20,641,465, 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 | 20,641,465 | |
| -1 | -20,641,465 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,641,465.
Example:
1 x 20,641,465 = 20,641,465
and
-1 x -20,641,465 = 20,641,465
Notice both answers equal 20,641,465
With that explanation out of the way, let's continue. Next, we take the number 20,641,465 and divide it by 2:
20,641,465 ÷ 2 = 10,320,732.5
If the quotient is a whole number, then 2 and 10,320,732.5 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 | 20,641,465 | |
| -1 | -20,641,465 |
Now, we try dividing 20,641,465 by 3:
20,641,465 ÷ 3 = 6,880,488.3333
If the quotient is a whole number, then 3 and 6,880,488.3333 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 | 20,641,465 | |
| -1 | -20,641,465 |
Let's try dividing by 4:
20,641,465 ÷ 4 = 5,160,366.25
If the quotient is a whole number, then 4 and 5,160,366.25 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 | 20,641,465 | |
| -1 | 20,641,465 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 23 | 65 | 115 | 299 | 1,495 | 13,807 | 69,035 | 179,491 | 317,561 | 897,455 | 1,587,805 | 4,128,293 | 20,641,465 |
| -1 | -5 | -13 | -23 | -65 | -115 | -299 | -1,495 | -13,807 | -69,035 | -179,491 | -317,561 | -897,455 | -1,587,805 | -4,128,293 | -20,641,465 |
Here are some more numbers to try:
Try the factor calculator