2² × 73²

Prime Factor Structure

Factorization String 2^2 × 73^2

Distinct Prime Factors 2

Square Status Yes (√21316 = 146)

Abundance Measure Deficient

Analytical Properties

Total Divisors 9

Divisor Sum (σ) 37,821

Proper Divisor Sum 16,505

Digit Sum / Digital Root 13 (Root: 4)

Adjacent Primes #21313 ← → #21317

1 2 4 73 146 292 5,329 10,658 21,316

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

21,316 10,658 5,329 15,988 7,994 3,997 11,992 5,996 2,998 1,499 4,498 2,249 6,748 3,374 1,687 5,062 2,531 7,594 3,797 11,392 5,696 2,848 1,424 712 356 178 89 268 134 67 202 101 304 152 76 38 19 58 29 88 44 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1

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