2 × 3² × 19 × 61

Prime Factor Structure

Factorization String 2 × 3^2 × 19 × 61

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 48,360

Proper Divisor Sum 27,498

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #20857 ← → #20873

1 2 3 6 9 18 19 38 57 61 114 122 171 183 342 366 549 1,098 1,159 2,318 3,477 6,954 10,431 20,862

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

20,862 10,431 31,294 15,647 46,942 23,471 70,414 35,207 105,622 52,811 158,434 79,217 237,652 118,826 59,413 178,240 89,120 44,560 22,280 11,140 5,570 2,785 8,356 4,178 2,089 6,268 3,134 1,567 4,702 2,351 7,054 3,527 10,582 5,291 15,874 7,937 23,812 11,906 5,953 17,860 8,930 4,465 13,396 6,698 3,349 10,048 5,024 2,512 1,256 628 314 157 472 236 118 59 178 89 268 134

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