A:
Positive:
1 x 25131523313 x 1933194117 x 1478324931 x 8106943221 x 1137173403 x 623611527 x 4768796851 x 36683
Negative:
-1 x -251315233-13 x -19331941-17 x -14783249-31 x -8106943-221 x -1137173-403 x -623611-527 x -476879-6851 x -36683
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 251,315,233, 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 | 251,315,233 | |
| -1 | -251,315,233 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 251,315,233.
Example:
1 x 251,315,233 = 251,315,233
and
-1 x -251,315,233 = 251,315,233
Notice both answers equal 251,315,233
With that explanation out of the way, let's continue. Next, we take the number 251,315,233 and divide it by 2:
251,315,233 ÷ 2 = 125,657,616.5
If the quotient is a whole number, then 2 and 125,657,616.5 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 | 251,315,233 | |
| -1 | -251,315,233 |
Now, we try dividing 251,315,233 by 3:
251,315,233 ÷ 3 = 83,771,744.3333
If the quotient is a whole number, then 3 and 83,771,744.3333 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 | 251,315,233 | |
| -1 | -251,315,233 |
Let's try dividing by 4:
251,315,233 ÷ 4 = 62,828,808.25
If the quotient is a whole number, then 4 and 62,828,808.25 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 | 251,315,233 | |
| -1 | 251,315,233 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 31 | 221 | 403 | 527 | 6,851 | 36,683 | 476,879 | 623,611 | 1,137,173 | 8,106,943 | 14,783,249 | 19,331,941 | 251,315,233 |
| -1 | -13 | -17 | -31 | -221 | -403 | -527 | -6,851 | -36,683 | -476,879 | -623,611 | -1,137,173 | -8,106,943 | -14,783,249 | -19,331,941 | -251,315,233 |
Here are some more numbers to try:
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