A:
Positive:
1 x 2513773555 x 5027547141 x 613115543 x 5845985205 x 1226231215 x 11691971763 x 1425858815 x 28517
Negative:
-1 x -251377355-5 x -50275471-41 x -6131155-43 x -5845985-205 x -1226231-215 x -1169197-1763 x -142585-8815 x -28517
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 251,377,355, 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 | 251,377,355 | |
| -1 | -251,377,355 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 251,377,355.
Example:
1 x 251,377,355 = 251,377,355
and
-1 x -251,377,355 = 251,377,355
Notice both answers equal 251,377,355
With that explanation out of the way, let's continue. Next, we take the number 251,377,355 and divide it by 2:
251,377,355 ÷ 2 = 125,688,677.5
If the quotient is a whole number, then 2 and 125,688,677.5 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 | 251,377,355 | |
| -1 | -251,377,355 |
Now, we try dividing 251,377,355 by 3:
251,377,355 ÷ 3 = 83,792,451.6667
If the quotient is a whole number, then 3 and 83,792,451.6667 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 | 251,377,355 | |
| -1 | -251,377,355 |
Let's try dividing by 4:
251,377,355 ÷ 4 = 62,844,338.75
If the quotient is a whole number, then 4 and 62,844,338.75 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 | 251,377,355 | |
| -1 | 251,377,355 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 43 | 205 | 215 | 1,763 | 8,815 | 28,517 | 142,585 | 1,169,197 | 1,226,231 | 5,845,985 | 6,131,155 | 50,275,471 | 251,377,355 |
| -1 | -5 | -41 | -43 | -205 | -215 | -1,763 | -8,815 | -28,517 | -142,585 | -1,169,197 | -1,226,231 | -5,845,985 | -6,131,155 | -50,275,471 | -251,377,355 |
Here are some more numbers to try:
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