A:
Positive:
1 x 619086055 x 1238172111 x 562805543 x 143973555 x 1125611215 x 287947473 x 1308852365 x 26177
Negative:
-1 x -61908605-5 x -12381721-11 x -5628055-43 x -1439735-55 x -1125611-215 x -287947-473 x -130885-2365 x -26177
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 61,908,605, 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 | 61,908,605 | |
| -1 | -61,908,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 61,908,605.
Example:
1 x 61,908,605 = 61,908,605
and
-1 x -61,908,605 = 61,908,605
Notice both answers equal 61,908,605
With that explanation out of the way, let's continue. Next, we take the number 61,908,605 and divide it by 2:
61,908,605 ÷ 2 = 30,954,302.5
If the quotient is a whole number, then 2 and 30,954,302.5 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 | 61,908,605 | |
| -1 | -61,908,605 |
Now, we try dividing 61,908,605 by 3:
61,908,605 ÷ 3 = 20,636,201.6667
If the quotient is a whole number, then 3 and 20,636,201.6667 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 | 61,908,605 | |
| -1 | -61,908,605 |
Let's try dividing by 4:
61,908,605 ÷ 4 = 15,477,151.25
If the quotient is a whole number, then 4 and 15,477,151.25 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 | 61,908,605 | |
| -1 | 61,908,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 43 | 55 | 215 | 473 | 2,365 | 26,177 | 130,885 | 287,947 | 1,125,611 | 1,439,735 | 5,628,055 | 12,381,721 | 61,908,605 |
| -1 | -5 | -11 | -43 | -55 | -215 | -473 | -2,365 | -26,177 | -130,885 | -287,947 | -1,125,611 | -1,439,735 | -5,628,055 | -12,381,721 | -61,908,605 |
Here are some more numbers to try:
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