2² × 5 × 641

Prime Factor Structure

Factorization String 2^2 × 5 × 641

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 26,964

Proper Divisor Sum 14,144

Digit Sum / Digital Root 13 (Root: 4)

Adjacent Primes #12809 ← → #12821

1 2 4 5 10 20 641 1,282 2,564 3,205 6,410 12,820

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

12,820 6,410 3,205 9,616 4,808 2,404 1,202 601 1,804 902 451 1,354 677 2,032 1,016 508 254 127 382 191 574 287 862 431 1,294 647 1,942 971 2,914 1,457 4,372 2,186 1,093 3,280 1,640 820 410 205 616 308 154 77 232 116 58 29 88 44 22 11 34 17 52 26 13 40 20 10 5 16

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