Factors / Factors of 80

Factors of 80

1, 2, 4, 5, 8, 10, 16, 20, 40, 80

80 breaks into 5 pairs, tested up to √80 ≈ 8.9; each pair multiplies back to 80 exactly. 80's full pair list is (1, 80), (2, 40), (4, 20), (5, 16), (8, 10), for 10 divisors in total. 80's divisors other than 80 itself sum to 106, 26 above 80: abundant. 80 is even, digit sum 8 for 80; small divisors of 80 include 2, 4, 5, 8, 10. 80 has 10 divisors; 79 has 2 and 81 has 5, so 80 wins here. 80 divided by its largest divisor, 40, gives 2.