128,583

3² × 7 × 13 × 157

Prime Factor Structure

Factorization String 3^2 × 7 × 13 × 157

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Total Divisors 24

Divisor Sum (σ) 230,048

Proper Divisor Sum 101,465

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #128563 ← → #128591

1 3 7 9 13 21 39 63 91 117 157 273 471 819 1,099 1,413 2,041 3,297 6,123 9,891 14,287 18,369 42,861 128,583

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

128,583 385,750 192,875 578,626 289,313 867,940 433,970 216,985 650,956 325,478 162,739 488,218 244,109 732,328 366,164 183,082 91,541 274,624 137,312 68,656 34,328 17,164 8,582 4,291 12,874 6,437 19,312 9,656 4,828 2,414 1,207 3,622 1,811 5,434 2,717 8,152 4,076 2,038 1,019 3,058 1,529 4,588 2,294 1,147 3,442 1,721 5,164 2,582 1,291 3,874 1,937 5,812 2,906 1,453 4,360 2,180 1,090 545 1,636 818

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