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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 ...
The following is a list of all 52 currently known (as of January 2025) Mersenne primes and corresponding perfect numbers, along with their exponents p. The largest 18 of these have been discovered by the distributed computing project Great Internet Mersenne Prime Search , or GIMPS; their discoverers are listed as "GIMPS / name ", where the name ...
2012 New York State Assembly election, District 54 [9] [10] Primary election Party Candidate Votes % Democratic: Rafael Espinal (incumbent) 2,245 : 65.9 : Democratic: Juan Rodriguez 1,152 33.8 Write-in: 9 0.3 Total votes 3,406 : 100.0 : General election Democratic: Rafael Espinal: 23,959 Conservative: Rafael Espinal: 283 Total : Rafael Espinal ...
Two numbers with the same "abundancy" form a friendly pair; n numbers with the same abundancy form a friendly n-tuple. Being mutually friendly is an equivalence relation, and thus induces a partition of the positive naturals into clubs (equivalence classes) of mutually friendly numbers. A number that is not part of any friendly pair is called ...
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In the case of numbers that are not square-free, the factorization is written without exponents, writing the repeated factor as many times as needed. Smith numbers were named by Albert Wilansky of Lehigh University, as he noticed the property in the phone number (493-7775) of his brother-in-law Harold Smith: 4937775 = 3 · 5 · 5 · 65837. while
1/12 the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest ≈ 1.660 539 068 92 (52) × 10 −27 kg [ 20 ] dram (apothecary; troy )
54 (fifty-four) is the natural number and positive integer following 53 and preceding 55.As a multiple of 2 but not of 4, 54 is an oddly even number and a composite number.. 54 is related to the golden ratio through trigonometry: the sine of a 54 degree angle is half of the golden ratio.