A:
Positive:
1 x 1421515137 x 2030735973 x 1947281149 x 954037511 x 2781831043 x 1362911867 x 7613910877 x 13069
Negative:
-1 x -142151513-7 x -20307359-73 x -1947281-149 x -954037-511 x -278183-1043 x -136291-1867 x -76139-10877 x -13069
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 142,151,513, 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 | 142,151,513 | |
| -1 | -142,151,513 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 142,151,513.
Example:
1 x 142,151,513 = 142,151,513
and
-1 x -142,151,513 = 142,151,513
Notice both answers equal 142,151,513
With that explanation out of the way, let's continue. Next, we take the number 142,151,513 and divide it by 2:
142,151,513 ÷ 2 = 71,075,756.5
If the quotient is a whole number, then 2 and 71,075,756.5 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 | 142,151,513 | |
| -1 | -142,151,513 |
Now, we try dividing 142,151,513 by 3:
142,151,513 ÷ 3 = 47,383,837.6667
If the quotient is a whole number, then 3 and 47,383,837.6667 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 | 142,151,513 | |
| -1 | -142,151,513 |
Let's try dividing by 4:
142,151,513 ÷ 4 = 35,537,878.25
If the quotient is a whole number, then 4 and 35,537,878.25 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 | 142,151,513 | |
| -1 | 142,151,513 |
If you did it right, you will end up with this table:
| 1 | 7 | 73 | 149 | 511 | 1,043 | 1,867 | 10,877 | 13,069 | 76,139 | 136,291 | 278,183 | 954,037 | 1,947,281 | 20,307,359 | 142,151,513 |
| -1 | -7 | -73 | -149 | -511 | -1,043 | -1,867 | -10,877 | -13,069 | -76,139 | -136,291 | -278,183 | -954,037 | -1,947,281 | -20,307,359 | -142,151,513 |
Here are some more numbers to try:
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