7 × 37 × 137 × 521

Prime Factor Structure

Factorization String 7 × 37 × 137 × 521

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 21,898,944

Proper Divisor Sum 3,412,301

Digit Sum / Digital Root 40 (Root: 4)

Adjacent Primes #18486631 ← → #18486649

1 7 37 137 259 521 959 3,647 5,069 19,277 35,483 71,377 134,939 499,639 2,640,949 18,486,643

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

18,486,643 55,459,930 27,729,965 83,189,896 41,594,948 20,797,474 10,398,737 31,196,212 15,598,106 7,799,053 23,397,160 11,698,580 5,849,290 2,924,645 8,773,936 4,386,968 2,193,484 1,096,742 548,371 1,645,114 822,557 2,467,672 1,233,836 616,918 308,459 925,378 462,689 1,388,068 694,034 347,017 1,041,052 520,526 260,263 780,790 390,395 1,171,186 585,593 1,756,780 878,390 439,195 1,317,586 658,793 1,976,380 988,190 494,095 1,482,286 741,143 2,223,430 1,111,715 3,335,146 1,667,573 5,002,720 2,501,360 1,250,680 625,340 312,670 156,335 469,006 234,503 703,510

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