3 × 7 × 19 × 397

Prime Factor Structure

Factorization String 3 × 7 × 19 × 397

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 254,720

Proper Divisor Sum 96,317

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #158393 ← → #158407

1 3 7 19 21 57 133 397 399 1,191 2,779 7,543 8,337 22,629 52,801 158,403

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

158,403 475,210 237,605 712,816 356,408 178,204 89,102 44,551 133,654 66,827 200,482 100,241 300,724 150,362 75,181 225,544 112,772 56,386 28,193 84,580 42,290 21,145 63,436 31,718 15,859 47,578 23,789 71,368 35,684 17,842 8,921 26,764 13,382 6,691 20,074 10,037 30,112 15,056 7,528 3,764 1,882 941 2,824 1,412 706 353 1,060 530 265 796 398 199 598 299 898 449 1,348 674 337 1,012

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