A:
Positive:
1 x 2501513217 x 3573590319 x 1316585949 x 510512989 x 2810689133 x 1880837623 x 401527931 x 2686911691 x 1479313019 x 828594361 x 5736111837 x 21133
Negative:
-1 x -250151321-7 x -35735903-19 x -13165859-49 x -5105129-89 x -2810689-133 x -1880837-623 x -401527-931 x -268691-1691 x -147931-3019 x -82859-4361 x -57361-11837 x -21133
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 250,151,321, 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 | 250,151,321 | |
| -1 | -250,151,321 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 250,151,321.
Example:
1 x 250,151,321 = 250,151,321
and
-1 x -250,151,321 = 250,151,321
Notice both answers equal 250,151,321
With that explanation out of the way, let's continue. Next, we take the number 250,151,321 and divide it by 2:
250,151,321 ÷ 2 = 125,075,660.5
If the quotient is a whole number, then 2 and 125,075,660.5 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 | 250,151,321 | |
| -1 | -250,151,321 |
Now, we try dividing 250,151,321 by 3:
250,151,321 ÷ 3 = 83,383,773.6667
If the quotient is a whole number, then 3 and 83,383,773.6667 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 | 250,151,321 | |
| -1 | -250,151,321 |
Let's try dividing by 4:
250,151,321 ÷ 4 = 62,537,830.25
If the quotient is a whole number, then 4 and 62,537,830.25 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 | 250,151,321 | |
| -1 | 250,151,321 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 49 | 89 | 133 | 623 | 931 | 1,691 | 3,019 | 4,361 | 11,837 | 21,133 | 57,361 | 82,859 | 147,931 | 268,691 | 401,527 | 1,880,837 | 2,810,689 | 5,105,129 | 13,165,859 | 35,735,903 | 250,151,321 |
| -1 | -7 | -19 | -49 | -89 | -133 | -623 | -931 | -1,691 | -3,019 | -4,361 | -11,837 | -21,133 | -57,361 | -82,859 | -147,931 | -268,691 | -401,527 | -1,880,837 | -2,810,689 | -5,105,129 | -13,165,859 | -35,735,903 | -250,151,321 |
Here are some more numbers to try:
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