3 × 5² × 281

Prime Factor Structure

Factorization String 3 × 5^2 × 281

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 34,968

Proper Divisor Sum 13,893

Digit Sum / Digital Root 15 (Root: 6)

Adjacent Primes #21067 ← → #21089

1 3 5 15 25 75 281 843 1,405 4,215 7,025 21,075

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

21,075 63,226 31,613 94,840 47,420 23,710 11,855 35,566 17,783 53,350 26,675 80,026 40,013 120,040 60,020 30,010 15,005 45,016 22,508 11,254 5,627 16,882 8,441 25,324 12,662 6,331 18,994 9,497 28,492 14,246 7,123 21,370 10,685 32,056 16,028 8,014 4,007 12,022 6,011 18,034 9,017 27,052 13,526 6,763 20,290 10,145 30,436 15,218 7,609 22,828 11,414 5,707 17,122 8,561 25,684 12,842 6,421 19,264 9,632 4,816

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