3² × 7 × 349

Prime Factor Structure

Factorization String 3^2 × 7 × 349

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 36,400

Proper Divisor Sum 14,413

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #21977 ← → #21991

1 3 7 9 21 63 349 1,047 2,443 3,141 7,329 21,987

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

21,987 65,962 32,981 98,944 49,472 24,736 12,368 6,184 3,092 1,546 773 2,320 1,160 580 290 145 436 218 109 328 164 82 41 124 62 31 94 47 142 71 214 107 322 161 484 242 121 364 182 91 274 137 412 206 103 310 155 466 233 700 350 175 526 263 790 395 1,186 593 1,780 890

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