2² × 3 × 13 × 139

Prime Factor Structure

Factorization String 2^2 × 3 × 13 × 139

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 54,880

Proper Divisor Sum 33,196

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #21683 ← → #21701

1 2 3 4 6 12 13 26 39 52 78 139 156 278 417 556 834 1,668 1,807 3,614 5,421 7,228 10,842 21,684

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

21,684 10,842 5,421 16,264 8,132 4,066 2,033 6,100 3,050 1,525 4,576 2,288 1,144 572 286 143 430 215 646 323 970 485 1,456 728 364 182 91 274 137 412 206 103 310 155 466 233 700 350 175 526 263 790 395 1,186 593 1,780 890 445 1,336 668 334 167 502 251 754 377 1,132 566 283 850

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