13 × 71 × 149 × 157

Prime Factor Structure

Factorization String 13 × 71 × 149 × 157

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 23,889,600

Proper Divisor Sum 2,297,861

Digit Sum / Digital Root 37 (Root: 1)

Adjacent Primes #21591737 ← → #21591749

1 13 71 149 157 923 1,937 2,041 10,579 11,147 23,393 137,527 144,911 304,109 1,660,903 21,591,739

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

21,591,739 64,775,218 32,387,609 97,162,828 48,581,414 24,290,707 72,872,122 36,436,061 109,308,184 54,654,092 27,327,046 13,663,523 40,990,570 20,495,285 61,485,856 30,742,928 15,371,464 7,685,732 3,842,866 1,921,433 5,764,300 2,882,150 1,441,075 4,323,226 2,161,613 6,484,840 3,242,420 1,621,210 810,605 2,431,816 1,215,908 607,954 303,977 911,932 455,966 227,983 683,950 341,975 1,025,926 512,963 1,538,890 769,445 2,308,336 1,154,168 577,084 288,542 144,271 432,814 216,407 649,222 324,611 973,834 486,917 1,460,752 730,376 365,188 182,594 91,297 273,892 136,946

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