2 × 3² × 21739

Prime Factor Structure

Factorization String 2 × 3^2 × 21739

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 847,860

Proper Divisor Sum 456,558

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #391301 ← → #391331

1 2 3 6 9 18 21,739 43,478 65,217 130,434 195,651 391,302

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

391,302 195,651 586,954 293,477 880,432 440,216 220,108 110,054 55,027 165,082 82,541 247,624 123,812 61,906 30,953 92,860 46,430 23,215 69,646 34,823 104,470 52,235 156,706 78,353 235,060 117,530 58,765 176,296 88,148 44,074 22,037 66,112 33,056 16,528 8,264 4,132 2,066 1,033 3,100 1,550 775 2,326 1,163 3,490 1,745 5,236 2,618 1,309 3,928 1,964 982 491 1,474 737 2,212 1,106 553 1,660 830 415

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