A:
Positive:
1 x 1554421555 x 3108843111 x 1413110555 x 2826221373 x 4167351865 x 833474103 x 378857577 x 20515
Negative:
-1 x -155442155-5 x -31088431-11 x -14131105-55 x -2826221-373 x -416735-1865 x -83347-4103 x -37885-7577 x -20515
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 155,442,155, 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 | 155,442,155 | |
| -1 | -155,442,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,442,155.
Example:
1 x 155,442,155 = 155,442,155
and
-1 x -155,442,155 = 155,442,155
Notice both answers equal 155,442,155
With that explanation out of the way, let's continue. Next, we take the number 155,442,155 and divide it by 2:
155,442,155 ÷ 2 = 77,721,077.5
If the quotient is a whole number, then 2 and 77,721,077.5 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 | 155,442,155 | |
| -1 | -155,442,155 |
Now, we try dividing 155,442,155 by 3:
155,442,155 ÷ 3 = 51,814,051.6667
If the quotient is a whole number, then 3 and 51,814,051.6667 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 | 155,442,155 | |
| -1 | -155,442,155 |
Let's try dividing by 4:
155,442,155 ÷ 4 = 38,860,538.75
If the quotient is a whole number, then 4 and 38,860,538.75 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 | 155,442,155 | |
| -1 | 155,442,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 373 | 1,865 | 4,103 | 7,577 | 20,515 | 37,885 | 83,347 | 416,735 | 2,826,221 | 14,131,105 | 31,088,431 | 155,442,155 |
| -1 | -5 | -11 | -55 | -373 | -1,865 | -4,103 | -7,577 | -20,515 | -37,885 | -83,347 | -416,735 | -2,826,221 | -14,131,105 | -31,088,431 | -155,442,155 |
Here are some more numbers to try:
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