Factors / Factors of 420

Factors of 420

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420

420 breaks into 12 pairs, tested up to √420 ≈ 20.5; each pair multiplies back to 420 exactly. 420's full pair list is (1, 420), (2, 210), (3, 140), (4, 105), (5, 84), (6, 70), (7, 60), (10, 42), (12, 35), (14, 30), (15, 28), (20, 21), for 24 divisors in total. 420's divisors other than 420 itself sum to 924, 504 above 420: abundant. 420 is even, digit sum 6 for 420; small divisors of 420 include 2, 3, 4, 5, 6. 420 has 24 divisors; 419 has 2 and 421 has 2, so 420 wins here. 420 divided by its largest divisor, 210, gives 2.