2 × 5 × 17 × 821

Prime Factor Structure

Factorization String 2 × 5 × 17 × 821

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 266,328

Proper Divisor Sum 126,758

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #139547 ← → #139571

1 2 5 10 17 34 85 170 821 1,642 4,105 8,210 13,957 27,914 69,785 139,570

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

139,570 69,785 209,356 104,678 52,339 157,018 78,509 235,528 117,764 58,882 29,441 88,324 44,162 22,081 66,244 33,122 16,561 49,684 24,842 12,421 37,264 18,632 9,316 4,658 2,329 6,988 3,494 1,747 5,242 2,621 7,864 3,932 1,966 983 2,950 1,475 4,426 2,213 6,640 3,320 1,660 830 415 1,246 623 1,870 935 2,806 1,403 4,210 2,105 6,316 3,158 1,579 4,738 2,369 7,108 3,554 1,777 5,332

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