A:
Positive:
1 x 1310122455 x 262024497 x 1871603513 x 1007786535 x 374320765 x 201557391 x 1439695455 x 287939
Negative:
-1 x -131012245-5 x -26202449-7 x -18716035-13 x -10077865-35 x -3743207-65 x -2015573-91 x -1439695-455 x -287939
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 131,012,245, 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 | 131,012,245 | |
| -1 | -131,012,245 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,012,245.
Example:
1 x 131,012,245 = 131,012,245
and
-1 x -131,012,245 = 131,012,245
Notice both answers equal 131,012,245
With that explanation out of the way, let's continue. Next, we take the number 131,012,245 and divide it by 2:
131,012,245 ÷ 2 = 65,506,122.5
If the quotient is a whole number, then 2 and 65,506,122.5 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 | 131,012,245 | |
| -1 | -131,012,245 |
Now, we try dividing 131,012,245 by 3:
131,012,245 ÷ 3 = 43,670,748.3333
If the quotient is a whole number, then 3 and 43,670,748.3333 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 | 131,012,245 | |
| -1 | -131,012,245 |
Let's try dividing by 4:
131,012,245 ÷ 4 = 32,753,061.25
If the quotient is a whole number, then 4 and 32,753,061.25 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 | 131,012,245 | |
| -1 | 131,012,245 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 65 | 91 | 455 | 287,939 | 1,439,695 | 2,015,573 | 3,743,207 | 10,077,865 | 18,716,035 | 26,202,449 | 131,012,245 |
| -1 | -5 | -7 | -13 | -35 | -65 | -91 | -455 | -287,939 | -1,439,695 | -2,015,573 | -3,743,207 | -10,077,865 | -18,716,035 | -26,202,449 | -131,012,245 |
Here are some more numbers to try:
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