A:
Positive:
1 x 138705055 x 277410111 x 126095541 x 33830555 x 252191205 x 67661451 x 307552255 x 6151
Negative:
-1 x -13870505-5 x -2774101-11 x -1260955-41 x -338305-55 x -252191-205 x -67661-451 x -30755-2255 x -6151
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 13,870,505, 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 | 13,870,505 | |
| -1 | -13,870,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,870,505.
Example:
1 x 13,870,505 = 13,870,505
and
-1 x -13,870,505 = 13,870,505
Notice both answers equal 13,870,505
With that explanation out of the way, let's continue. Next, we take the number 13,870,505 and divide it by 2:
13,870,505 ÷ 2 = 6,935,252.5
If the quotient is a whole number, then 2 and 6,935,252.5 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 | 13,870,505 | |
| -1 | -13,870,505 |
Now, we try dividing 13,870,505 by 3:
13,870,505 ÷ 3 = 4,623,501.6667
If the quotient is a whole number, then 3 and 4,623,501.6667 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 | 13,870,505 | |
| -1 | -13,870,505 |
Let's try dividing by 4:
13,870,505 ÷ 4 = 3,467,626.25
If the quotient is a whole number, then 4 and 3,467,626.25 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 | 13,870,505 | |
| -1 | 13,870,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 41 | 55 | 205 | 451 | 2,255 | 6,151 | 30,755 | 67,661 | 252,191 | 338,305 | 1,260,955 | 2,774,101 | 13,870,505 |
| -1 | -5 | -11 | -41 | -55 | -205 | -451 | -2,255 | -6,151 | -30,755 | -67,661 | -252,191 | -338,305 | -1,260,955 | -2,774,101 | -13,870,505 |
Here are some more numbers to try:
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