3 × 7² × 137

Prime Factor Structure

Factorization String 3 × 7^2 × 137

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 31,464

Proper Divisor Sum 11,325

Digit Sum / Digital Root 15 (Root: 6)

Adjacent Primes #20129 ← → #20143

1 3 7 21 49 137 147 411 959 2,877 6,713 20,139

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

20,139 60,418 30,209 90,628 45,314 22,657 67,972 33,986 16,993 50,980 25,490 12,745 38,236 19,118 9,559 28,678 14,339 43,018 21,509 64,528 32,264 16,132 8,066 4,033 12,100 6,050 3,025 9,076 4,538 2,269 6,808 3,404 1,702 851 2,554 1,277 3,832 1,916 958 479 1,438 719 2,158 1,079 3,238 1,619 4,858 2,429 7,288 3,644 1,822 911 2,734 1,367 4,102 2,051 6,154 3,077 9,232 4,616

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.