A:
Positive:
1 x 12111555 x 24223111 x 11010519 x 6374555 x 2202161 x 1985595 x 12749209 x 5795305 x 3971361 x 3355671 x 18051045 x 1159
Negative:
-1 x -1211155-5 x -242231-11 x -110105-19 x -63745-55 x -22021-61 x -19855-95 x -12749-209 x -5795-305 x -3971-361 x -3355-671 x -1805-1045 x -1159
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 1,211,155, 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 | 1,211,155 | |
| -1 | -1,211,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,211,155.
Example:
1 x 1,211,155 = 1,211,155
and
-1 x -1,211,155 = 1,211,155
Notice both answers equal 1,211,155
With that explanation out of the way, let's continue. Next, we take the number 1,211,155 and divide it by 2:
1,211,155 ÷ 2 = 605,577.5
If the quotient is a whole number, then 2 and 605,577.5 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 | 1,211,155 | |
| -1 | -1,211,155 |
Now, we try dividing 1,211,155 by 3:
1,211,155 ÷ 3 = 403,718.3333
If the quotient is a whole number, then 3 and 403,718.3333 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 | 1,211,155 | |
| -1 | -1,211,155 |
Let's try dividing by 4:
1,211,155 ÷ 4 = 302,788.75
If the quotient is a whole number, then 4 and 302,788.75 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 | 1,211,155 | |
| -1 | 1,211,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 19 | 55 | 61 | 95 | 209 | 305 | 361 | 671 | 1,045 | 1,159 | 1,805 | 3,355 | 3,971 | 5,795 | 12,749 | 19,855 | 22,021 | 63,745 | 110,105 | 242,231 | 1,211,155 |
| -1 | -5 | -11 | -19 | -55 | -61 | -95 | -209 | -305 | -361 | -671 | -1,045 | -1,159 | -1,805 | -3,355 | -3,971 | -5,795 | -12,749 | -19,855 | -22,021 | -63,745 | -110,105 | -242,231 | -1,211,155 |
Here are some more numbers to try:
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