A:
Positive:
1 x 10078144713 x 775241971 x 1419457137 x 735631797 x 126451923 x 1091891781 x 565879727 x 10361
Negative:
-1 x -100781447-13 x -7752419-71 x -1419457-137 x -735631-797 x -126451-923 x -109189-1781 x -56587-9727 x -10361
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 100,781,447, 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 | 100,781,447 | |
| -1 | -100,781,447 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 100,781,447.
Example:
1 x 100,781,447 = 100,781,447
and
-1 x -100,781,447 = 100,781,447
Notice both answers equal 100,781,447
With that explanation out of the way, let's continue. Next, we take the number 100,781,447 and divide it by 2:
100,781,447 ÷ 2 = 50,390,723.5
If the quotient is a whole number, then 2 and 50,390,723.5 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 | 100,781,447 | |
| -1 | -100,781,447 |
Now, we try dividing 100,781,447 by 3:
100,781,447 ÷ 3 = 33,593,815.6667
If the quotient is a whole number, then 3 and 33,593,815.6667 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 | 100,781,447 | |
| -1 | -100,781,447 |
Let's try dividing by 4:
100,781,447 ÷ 4 = 25,195,361.75
If the quotient is a whole number, then 4 and 25,195,361.75 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 | 100,781,447 | |
| -1 | 100,781,447 |
If you did it right, you will end up with this table:
| 1 | 13 | 71 | 137 | 797 | 923 | 1,781 | 9,727 | 10,361 | 56,587 | 109,189 | 126,451 | 735,631 | 1,419,457 | 7,752,419 | 100,781,447 |
| -1 | -13 | -71 | -137 | -797 | -923 | -1,781 | -9,727 | -10,361 | -56,587 | -109,189 | -126,451 | -735,631 | -1,419,457 | -7,752,419 | -100,781,447 |
Here are some more numbers to try:
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