A:
Positive:
1 x 6453660255 x 12907320525 x 2581464137 x 17442325185 x 3488465925 x 697693
Negative:
-1 x -645366025-5 x -129073205-25 x -25814641-37 x -17442325-185 x -3488465-925 x -697693
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 645,366,025, 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 | 645,366,025 | |
| -1 | -645,366,025 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 645,366,025.
Example:
1 x 645,366,025 = 645,366,025
and
-1 x -645,366,025 = 645,366,025
Notice both answers equal 645,366,025
With that explanation out of the way, let's continue. Next, we take the number 645,366,025 and divide it by 2:
645,366,025 ÷ 2 = 322,683,012.5
If the quotient is a whole number, then 2 and 322,683,012.5 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 | 645,366,025 | |
| -1 | -645,366,025 |
Now, we try dividing 645,366,025 by 3:
645,366,025 ÷ 3 = 215,122,008.3333
If the quotient is a whole number, then 3 and 215,122,008.3333 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 | 645,366,025 | |
| -1 | -645,366,025 |
Let's try dividing by 4:
645,366,025 ÷ 4 = 161,341,506.25
If the quotient is a whole number, then 4 and 161,341,506.25 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 | 645,366,025 | |
| -1 | 645,366,025 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 37 | 185 | 925 | 697,693 | 3,488,465 | 17,442,325 | 25,814,641 | 129,073,205 | 645,366,025 |
| -1 | -5 | -25 | -37 | -185 | -925 | -697,693 | -3,488,465 | -17,442,325 | -25,814,641 | -129,073,205 | -645,366,025 |
Here are some more numbers to try:
Try the factor calculator