A:
Positive:
1 x 1552222155 x 3104444337 x 419519559 x 2630885185 x 839039295 x 5261772183 x 7110510915 x 14221
Negative:
-1 x -155222215-5 x -31044443-37 x -4195195-59 x -2630885-185 x -839039-295 x -526177-2183 x -71105-10915 x -14221
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 155,222,215, 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 | 155,222,215 | |
| -1 | -155,222,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,222,215.
Example:
1 x 155,222,215 = 155,222,215
and
-1 x -155,222,215 = 155,222,215
Notice both answers equal 155,222,215
With that explanation out of the way, let's continue. Next, we take the number 155,222,215 and divide it by 2:
155,222,215 ÷ 2 = 77,611,107.5
If the quotient is a whole number, then 2 and 77,611,107.5 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 | 155,222,215 | |
| -1 | -155,222,215 |
Now, we try dividing 155,222,215 by 3:
155,222,215 ÷ 3 = 51,740,738.3333
If the quotient is a whole number, then 3 and 51,740,738.3333 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 | 155,222,215 | |
| -1 | -155,222,215 |
Let's try dividing by 4:
155,222,215 ÷ 4 = 38,805,553.75
If the quotient is a whole number, then 4 and 38,805,553.75 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 | 155,222,215 | |
| -1 | 155,222,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 37 | 59 | 185 | 295 | 2,183 | 10,915 | 14,221 | 71,105 | 526,177 | 839,039 | 2,630,885 | 4,195,195 | 31,044,443 | 155,222,215 |
| -1 | -5 | -37 | -59 | -185 | -295 | -2,183 | -10,915 | -14,221 | -71,105 | -526,177 | -839,039 | -2,630,885 | -4,195,195 | -31,044,443 | -155,222,215 |
Here are some more numbers to try:
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