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413:(its divisors 1, 2, 4, 8, 16, 32, 64, 127, 254, 508, 1016, 2032, and 4064 add up to 8128), and one of the earliest numbers to be recognized as such. As a perfect number, it is tied to the
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is a power of two, and it is a harmonic seed number (though there are deficient and abundant numbers that share these properties).
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Another consequence of 8128 being a perfect number is that it has the same prime factors as the sum of its divisors, its
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420:, 2 – 1, with 2 (2 – 1) yielding 8128. Also related to its being a perfect number, 8128 is a
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509:"Sloane's A060544 : Centered 9-gonal (also known as nonagonal or enneagonal) numbers"
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57:. Unsourced material may be challenged and removed.
484:"Sloane's A001599 : Harmonic or Ore numbers"
513:The On-Line Encyclopedia of Integer Sequences
488:The On-Line Encyclopedia of Integer Sequences
8:
229:(eight thousand one hundred twenty-eighth)
117:Learn how and when to remove this message
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217:eight thousand one hundred twenty-eight
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55:adding citations to reliable sources
406:following 8127 and preceding 8129.
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409:It is most notable for being a
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452:centered nonagonal number
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422:harmonic divisor number
51:improve this article
434:8128 is the 127th
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515:. OEIS Foundation
490:. OEIS Foundation
436:triangular number
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16:(Redirected from
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311:MMMCXXVIII, or
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159:List of numbers
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411:perfect number
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129:Natural number
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448:-gonal number
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235:Factorization
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68: –
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62:Find sources:
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40:This article
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18:8128 (number)
517:. Retrieved
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492:. Retrieved
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444:happy number
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145:8129 →
139:← 8127
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49:Please help
44:verification
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438:, the 64th
386:Hexadecimal
519:2016-06-03
494:2016-06-03
470:References
373:Duodecimal
77:newspapers
429:cototient
338:102011001
107:June 2016
540:Integers
534:Category
458:See also
245:Divisors
213:Cardinal
164:Integers
404:integer
402:is the
334:Ternary
315:CXXVIII
239:2 × 127
223:Ordinal
91:scholar
351:101344
347:Senary
321:Binary
298:,ΗΡΚΗ´
227:8128th
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66:"8128"
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364:17700
360:Octal
98:JSTOR
84:books
442:, a
400:8128
390:1FC0
377:4854
313:VIII
142:8128
70:news
418:127
286:508
282:254
278:127
53:by
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379:12
284:,
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202:9k
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181:2k
178:1k
522:.
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366:8
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340:3
327:2
309:V
262:8
258:4
254:2
250:1
205:→
175:0
172:←
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105:(
95:·
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