A:
Positive:
1 x 6455174537 x 9221677979 x 8171107439 x 1470427553 x 11673012659 x 2427673073 x 21006118613 x 34681
Negative:
-1 x -645517453-7 x -92216779-79 x -8171107-439 x -1470427-553 x -1167301-2659 x -242767-3073 x -210061-18613 x -34681
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 645,517,453, 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 | 645,517,453 | |
| -1 | -645,517,453 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 645,517,453.
Example:
1 x 645,517,453 = 645,517,453
and
-1 x -645,517,453 = 645,517,453
Notice both answers equal 645,517,453
With that explanation out of the way, let's continue. Next, we take the number 645,517,453 and divide it by 2:
645,517,453 ÷ 2 = 322,758,726.5
If the quotient is a whole number, then 2 and 322,758,726.5 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 | 645,517,453 | |
| -1 | -645,517,453 |
Now, we try dividing 645,517,453 by 3:
645,517,453 ÷ 3 = 215,172,484.3333
If the quotient is a whole number, then 3 and 215,172,484.3333 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 | 645,517,453 | |
| -1 | -645,517,453 |
Let's try dividing by 4:
645,517,453 ÷ 4 = 161,379,363.25
If the quotient is a whole number, then 4 and 161,379,363.25 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 | 645,517,453 | |
| -1 | 645,517,453 |
If you did it right, you will end up with this table:
| 1 | 7 | 79 | 439 | 553 | 2,659 | 3,073 | 18,613 | 34,681 | 210,061 | 242,767 | 1,167,301 | 1,470,427 | 8,171,107 | 92,216,779 | 645,517,453 |
| -1 | -7 | -79 | -439 | -553 | -2,659 | -3,073 | -18,613 | -34,681 | -210,061 | -242,767 | -1,167,301 | -1,470,427 | -8,171,107 | -92,216,779 | -645,517,453 |
Here are some more numbers to try:
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