Two numbers are amicable or “friendly” if each is equal to the sum of the natural number divisors of the other. This is excluding the numbers themselves. The first pair of amicable numbers, (220 & 284) are said to have[…]
Category: Advanced Number Curiosities
The Kaprekar process was named for the well-known Indian mathematician D.R. Kaprekar and focuses on four-digit numbers which are very unique. Take any four-digit number, (make sure that not all digits are the same) and arrange its digits in both[…]
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