Factors / Factors of 280

Factors of 280

1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280

280 breaks into 8 pairs, tested up to √280 ≈ 16.7; each pair multiplies back to 280 exactly. 280's full pair list is (1, 280), (2, 140), (4, 70), (5, 56), (7, 40), (8, 35), (10, 28), (14, 20), for 16 divisors in total. 280's divisors other than 280 itself sum to 440, 160 above 280: abundant. 280 is even, digit sum 10 for 280; small divisors of 280 include 2, 4, 5, 7, 8. 280 has 16 divisors; 279 has 6 and 281 has 2, so 280 wins here. 280 divided by its largest divisor, 140, gives 2.