A:
Positive:
1 x 26147175123 x 1136833779 x 3309769151 x 1731601953 x 2743671817 x 1439033473 x 7528711929 x 21919
Negative:
-1 x -261471751-23 x -11368337-79 x -3309769-151 x -1731601-953 x -274367-1817 x -143903-3473 x -75287-11929 x -21919
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 261,471,751, 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 | 261,471,751 | |
| -1 | -261,471,751 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 261,471,751.
Example:
1 x 261,471,751 = 261,471,751
and
-1 x -261,471,751 = 261,471,751
Notice both answers equal 261,471,751
With that explanation out of the way, let's continue. Next, we take the number 261,471,751 and divide it by 2:
261,471,751 ÷ 2 = 130,735,875.5
If the quotient is a whole number, then 2 and 130,735,875.5 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 | 261,471,751 | |
| -1 | -261,471,751 |
Now, we try dividing 261,471,751 by 3:
261,471,751 ÷ 3 = 87,157,250.3333
If the quotient is a whole number, then 3 and 87,157,250.3333 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 | 261,471,751 | |
| -1 | -261,471,751 |
Let's try dividing by 4:
261,471,751 ÷ 4 = 65,367,937.75
If the quotient is a whole number, then 4 and 65,367,937.75 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 | 261,471,751 | |
| -1 | 261,471,751 |
If you did it right, you will end up with this table:
| 1 | 23 | 79 | 151 | 953 | 1,817 | 3,473 | 11,929 | 21,919 | 75,287 | 143,903 | 274,367 | 1,731,601 | 3,309,769 | 11,368,337 | 261,471,751 |
| -1 | -23 | -79 | -151 | -953 | -1,817 | -3,473 | -11,929 | -21,919 | -75,287 | -143,903 | -274,367 | -1,731,601 | -3,309,769 | -11,368,337 | -261,471,751 |
Here are some more numbers to try:
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