A:
Positive:
1 x 1400432155 x 2800864313 x 1077255565 x 2154511157 x 891995785 x 1783992041 x 6861510205 x 13723
Negative:
-1 x -140043215-5 x -28008643-13 x -10772555-65 x -2154511-157 x -891995-785 x -178399-2041 x -68615-10205 x -13723
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 140,043,215, 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 | 140,043,215 | |
| -1 | -140,043,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 140,043,215.
Example:
1 x 140,043,215 = 140,043,215
and
-1 x -140,043,215 = 140,043,215
Notice both answers equal 140,043,215
With that explanation out of the way, let's continue. Next, we take the number 140,043,215 and divide it by 2:
140,043,215 ÷ 2 = 70,021,607.5
If the quotient is a whole number, then 2 and 70,021,607.5 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 | 140,043,215 | |
| -1 | -140,043,215 |
Now, we try dividing 140,043,215 by 3:
140,043,215 ÷ 3 = 46,681,071.6667
If the quotient is a whole number, then 3 and 46,681,071.6667 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 | 140,043,215 | |
| -1 | -140,043,215 |
Let's try dividing by 4:
140,043,215 ÷ 4 = 35,010,803.75
If the quotient is a whole number, then 4 and 35,010,803.75 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 | 140,043,215 | |
| -1 | 140,043,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 157 | 785 | 2,041 | 10,205 | 13,723 | 68,615 | 178,399 | 891,995 | 2,154,511 | 10,772,555 | 28,008,643 | 140,043,215 |
| -1 | -5 | -13 | -65 | -157 | -785 | -2,041 | -10,205 | -13,723 | -68,615 | -178,399 | -891,995 | -2,154,511 | -10,772,555 | -28,008,643 | -140,043,215 |
Here are some more numbers to try:
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