3³ × 11 × 71

Prime Factor Structure

Factorization String 3^3 × 11 × 71

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 34,560

Proper Divisor Sum 13,473

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #21067 ← → #21089

1 3 9 11 27 33 71 99 213 297 639 781 1,917 2,343 7,029 21,087

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

21,087 63,262 31,631 94,894 47,447 142,342 71,171 213,514 106,757 320,272 160,136 80,068 40,034 20,017 60,052 30,026 15,013 45,040 22,520 11,260 5,630 2,815 8,446 4,223 12,670 6,335 19,006 9,503 28,510 14,255 42,766 21,383 64,150 32,075 96,226 48,113 144,340 72,170 36,085 108,256 54,128 27,064 13,532 6,766 3,383 10,150 5,075 15,226 7,613 22,840 11,420 5,710 2,855 8,566 4,283 12,850 6,425 19,276 9,638 4,819

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