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84 is a semiperfect number, [1] being thrice a perfect number, and the sum of the sixth pair of twin primes (+). [2] It is the number of four-digit perfect powers in decimal . [ 3 ]
m is a divisor of n (also called m divides n, or n is divisible by m) if all prime factors of m have at least the same multiplicity in n. The divisors of n are all products of some or all prime factors of n (including the empty product 1 of no prime factors). The number of divisors can be computed by increasing all multiplicities by 1 and then ...
[84] Deck13 Interactive, CI Games: CI Games: Mad Max: A video game adaptation of the Mad Max franchise was announced at E3 2013, and was set to release the following year on PlayStation 3, PlayStation 4, PC, Xbox 360, and Xbox One. Following a delay, it was announced in May 2015 that the ports for the two older systems had been cancelled due to ...
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For example, the "primitive" friendly pair 6 and 28 gives rise to friendly pairs 6n and 28n for all n that are congruent to 1, 5, 11, 13, 17, 19, 23, 25, 29, 31, 37, or 41 modulo 42. [ 4 ] This shows that the natural density of the friendly numbers (if it exists) is positive.
A pair of amicable numbers is a set of sociable numbers of order 2. There are no known sociable numbers of order 3, and searches for them have been made up to 5 × 10 7 {\displaystyle 5\times 10^{7}} as of 1970.
Mahjong solitaire can be played either solo or with a partner, in which case the aim is to accumulate the most pairs, to be the last one to match a pair, or to score the most points. Points are gained for each pair removed, with bonus points for removing matched pairs in sequence or removing pairs in sequence that are parts of sets.
If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1255 ahead. Let's start with a few hints.