3 × 5 × 7 × 11 × 19

Prime Factor Structure

Factorization String 3 × 5 × 7 × 11 × 19

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 32

Divisor Sum (σ) 46,080

Proper Divisor Sum 24,135

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #21943 ← → #21961

1 3 5 7 11 15 19 21 33 35 55 57 77 95 105 133 165 209 231 285 385 399 627 665 1,045 1,155 1,463 1,995 3,135 4,389 7,315 21,945

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

21,945 65,836 32,918 16,459 49,378 24,689 74,068 37,034 18,517 55,552 27,776 13,888 6,944 3,472 1,736 868 434 217 652 326 163 490 245 736 368 184 92 46 23 70 35 106 53 160 80 40 20 10 5 16 8 4 2 1

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