3 × 7 × 137 × 149

Prime Factor Structure

Factorization String 3 × 7 × 137 × 149

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 662,400

Proper Divisor Sum 233,727

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #428671 ← → #428677

1 3 7 21 137 149 411 447 959 1,043 2,877 3,129 20,413 61,239 142,891 428,673

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

428,673 1,286,020 643,010 321,505 964,516 482,258 241,129 723,388 361,694 180,847 542,542 271,271 813,814 406,907 1,220,722 610,361 1,831,084 915,542 457,771 1,373,314 686,657 2,059,972 1,029,986 514,993 1,544,980 772,490 386,245 1,158,736 579,368 289,684 144,842 72,421 217,264 108,632 54,316 27,158 13,579 40,738 20,369 61,108 30,554 15,277 45,832 22,916 11,458 5,729 17,188 8,594 4,297 12,892 6,446 3,223 9,670 4,835 14,506 7,253 21,760 10,880 5,440 2,720

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