2² × 5² × 21391

Prime Factor Structure

Factorization String 2^2 × 5^2 × 21391

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 4,642,064

Proper Divisor Sum 2,502,964

Digit Sum / Digital Root 16 (Root: 7)

Adjacent Primes #2139091 ← → #2139107

1 2 4 5 10 20 25 50 100 21,391 42,782 85,564 106,955 213,910 427,820 534,775 1,069,550 2,139,100

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

2,139,100 1,069,550 534,775 1,604,326 802,163 2,406,490 1,203,245 3,609,736 1,804,868 902,434 451,217 1,353,652 676,826 338,413 1,015,240 507,620 253,810 126,905 380,716 190,358 95,179 285,538 142,769 428,308 214,154 107,077 321,232 160,616 80,308 40,154 20,077 60,232 30,116 15,058 7,529 22,588 11,294 5,647 16,942 8,471 25,414 12,707 38,122 19,061 57,184 28,592 14,296 7,148 3,574 1,787 5,362 2,681 8,044 4,022 2,011 6,034 3,017 9,052 4,526 2,263

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