Factors / Factors of 404

Factors of 404

1, 2, 4, 101, 202, 404

404 breaks into 3 pairs, tested up to √404 ≈ 20.1; each pair multiplies back to 404 exactly. 404's full pair list is (1, 404), (2, 202), (4, 101), for 6 divisors in total. 404's divisors other than 404 itself sum to just 310, 94 below 404: the common deficient case. 404 is even, digit sum 8 for 404; small divisors of 404 include 2, 4. 404 has 6 divisors; 403 has 4 and 405 has 10, so 405 wins here. 404 divided by its largest divisor, 202, gives 2.