John and Doves,
Phil, Re: http://www.fivedoves.com/letters/feb2011/phil214-1.htm
Sorry, please look at this website… much better maths calculating :)
http://www.wolframalpha.com/examples/Math.html
http://www.wolframalpha.com/examples/NumberTheory.html
divisors (or factors - e.g.) 11022011