A:
Positive:
1 x 61556415713 x 4735108923 x 26763659299 x 2058743967 x 6365712129 x 28913312571 x 4896722241 x 27677
Negative:
-1 x -615564157-13 x -47351089-23 x -26763659-299 x -2058743-967 x -636571-2129 x -289133-12571 x -48967-22241 x -27677
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 615,564,157, 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 | 615,564,157 | |
| -1 | -615,564,157 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 615,564,157.
Example:
1 x 615,564,157 = 615,564,157
and
-1 x -615,564,157 = 615,564,157
Notice both answers equal 615,564,157
With that explanation out of the way, let's continue. Next, we take the number 615,564,157 and divide it by 2:
615,564,157 ÷ 2 = 307,782,078.5
If the quotient is a whole number, then 2 and 307,782,078.5 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 | 615,564,157 | |
| -1 | -615,564,157 |
Now, we try dividing 615,564,157 by 3:
615,564,157 ÷ 3 = 205,188,052.3333
If the quotient is a whole number, then 3 and 205,188,052.3333 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 | 615,564,157 | |
| -1 | -615,564,157 |
Let's try dividing by 4:
615,564,157 ÷ 4 = 153,891,039.25
If the quotient is a whole number, then 4 and 153,891,039.25 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 | 615,564,157 | |
| -1 | 615,564,157 |
If you did it right, you will end up with this table:
| 1 | 13 | 23 | 299 | 967 | 2,129 | 12,571 | 22,241 | 27,677 | 48,967 | 289,133 | 636,571 | 2,058,743 | 26,763,659 | 47,351,089 | 615,564,157 |
| -1 | -13 | -23 | -299 | -967 | -2,129 | -12,571 | -22,241 | -27,677 | -48,967 | -289,133 | -636,571 | -2,058,743 | -26,763,659 | -47,351,089 | -615,564,157 |
Here are some more numbers to try:
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