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54 as the sum of three positive squares. 54 is an abundant number [1] because the sum of its proper divisors , [2] which excludes 54 as a divisor, is greater than itself. Like all multiples of 6, [3] 54 is equal to some of its proper divisors summed together, [a] so it is also a semiperfect number. [4]
The numbers that these two lists have in common are the common divisors of 54 and 24, that is, 1 , 2 , 3 , 6. {\displaystyle 1,2,3,6.} Of these, the greatest is 6, so it is the greatest common divisor :
d() is the number of positive divisors of n, including 1 and n itself; σ() is the sum of the positive divisors of n, including 1 and n itselfs() is the sum of the proper divisors of n, including 1 but not n itself; that is, s(n) = σ(n) − n
m and n are coprime (also called relatively prime) if gcd(m, n) = 1 (meaning they have no common prime factor). lcm(m, n) (least common multiple of m and n) is the product of all prime factors of m or n (with the largest multiplicity for m or n). gcd(m, n) × lcm(m, n) = m × n. Finding the prime factors is often harder than computing gcd and ...
The length of an interval of consecutive integers with property that every element has a factor in common with one of the endpoints. A059756: Sierpinski numbers: 78557, 271129, 271577, 322523, 327739, 482719, 575041, 603713, 903983, 934909, ... Odd k for which { k⋅2 n + 1 : n ∈ } consists only of composite numbers. A076336
“I want to know if asking for this courtesy is too much or unreasonable in a relationship,” the man wrote on Reddit
An 18-year-old Dalit woman from the southern India state of Kerala has accused 64 men of sexually abusing her since she was 13 years old. Police have arrested 28 people in connection with the case ...
U.S. President-elect Donald Trump said "anything can happen" when asked about the chances of going to war with Iran during his next term in an interview with Time, coinciding with his being named ...