155,156

2² × 79 × 491

155,156 factors as 2^2 × 79 × 491. Its 12 positive divisors give a proper-divisor sum of 120,364, so this integer is deficient. The Collatz stopping time is 139 steps.

Prime Factor Structure

Factorization String 2^2 × 79 × 491

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 275,520

Proper Divisor Sum 120,364

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #155153 ← → #155161

Radix Representation

Decimal	155156
Binary	100101111000010100 (18 bits)
Octal	0o457024
Hexadecimal	0x25E14

Divisor Catalog (12)

1 2 4 79 158 316 491 982 1,964 38,789 77,578 155,156

Collatz Trajectory (139 steps to reach 1)

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

155,156 77,578 38,789 116,368 58,184 29,092 14,546 7,273 21,820 10,910 5,455 16,366 8,183 24,550 12,275 36,826 18,413 55,240 27,620 13,810 6,905 20,716 10,358 5,179 15,538 7,769 23,308 11,654 5,827 17,482 8,741 26,224 13,112 6,556 3,278 1,639 4,918 2,459 7,378 3,689 11,068 5,534 2,767 8,302 4,151 12,454 6,227 18,682 9,341 28,024 14,012 7,006 3,503 10,510 5,255 15,766 7,883 23,650 11,825 35,476

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