### BARS::14 Miles From Casa Grande on AZ Hwy-187 in Arizona

This road sign is on westbound AZ Hwy-187 in Arizona.

```   +----------------------+
| Casa Grande       14 |
| Tucson            81 |
+----------------------+
```
```   the numbers are:  14  81

BARSfunc math:  spf(14) = sqrt(81)
* spf(n) = the sum of the prime factors of n
* spf(14) = 2+7 = 9

BARSfunc math:  sqrt(spf(14)) = 4throot(81)
* 4throot(81) = 3 because 3^4 = 81

BARSfunc rsCardinality:  sqrt(sqrt(81)) - log(spd(14)) = 2
* There are 2 numbers in this road sign.
* spd(n) = the sum of the proper divisors of n
domain: n must be a composite number
* spd(14) = 1+2+7 = 10

off-by-one BARSfunc 42Eval:  spd(81) + log(spd(14)) = 42-1
* 42 is the "Answer to Life, the Universe, and Everything"
* spd(81) = 1+3+9+27 = 40
```
##### First Usage of the spd(n) BARS Function

The spd(n) function was added to the BARS function library on 22 November 2013. This was the first BARS to use the spd(n) function.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 23 November 2013 