3 × 5 × 23 × 643

Prime Factor Structure

Factorization String 3 × 5 × 23 × 643

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 370,944

Proper Divisor Sum 149,109

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #221831 ← → #221849

1 3 5 15 23 69 115 345 643 1,929 3,215 9,645 14,789 44,367 73,945 221,835

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

221,835 665,506 332,753 998,260 499,130 249,565 748,696 374,348 187,174 93,587 280,762 140,381 421,144 210,572 105,286 52,643 157,930 78,965 236,896 118,448 59,224 29,612 14,806 7,403 22,210 11,105 33,316 16,658 8,329 24,988 12,494 6,247 18,742 9,371 28,114 14,057 42,172 21,086 10,543 31,630 15,815 47,446 23,723 71,170 35,585 106,756 53,378 26,689 80,068 40,034 20,017 60,052 30,026 15,013 45,040 22,520 11,260 5,630 2,815 8,446

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