λ
Sigma Notebook

157,442

2 × 78721
Deficient Even Composite

157,442 is even and not a perfect square. Its factorization is 2 × 78721 and its 4 divisors sum to 236,166.

Prime Factor Structure

Factorization String 2 × 78721
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 236,166
Proper Divisor Sum 78,724
Digit Sum / Digital Root 23 (Root: 5)
Adjacent Primes #157433 ← → #157457

Radix Representation

Decimal 157442
Binary 100110011100000010 (18 bits)
Octal 0o463402
Hexadecimal 0x26702

Divisor Catalog (4)

1 2 78,721 157,442

Collatz Trajectory (170 steps to reach 1)

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

157,442 78,721 236,164 118,082 59,041 177,124 88,562 44,281 132,844 66,422 33,211 99,634 49,817 149,452 74,726 37,363 112,090 56,045 168,136 84,068 42,034 21,017 63,052 31,526 15,763 47,290 23,645 70,936 35,468 17,734 8,867 26,602 13,301 39,904 19,952 9,976 4,988 2,494 1,247 3,742 1,871 5,614 2,807 8,422 4,211 12,634 6,317 18,952 9,476 4,738 2,369 7,108 3,554 1,777 5,332 2,666 1,333 4,000 2,000 1,000

More profiles

← Previous Integer #157,441 Browse Full Index Next Integer #157,443 →