Factors / Factors of 357

Factors of 357

1, 3, 7, 17, 21, 51, 119, 357

357 breaks into 4 pairs, tested up to √357 ≈ 18.9; each pair multiplies back to 357 exactly. 357's full pair list is (1, 357), (3, 119), (7, 51), (17, 21), for 8 divisors in total. 357's divisors other than 357 itself sum to just 219, 138 below 357: the common deficient case. 357 is odd, digit sum 15 for 357; small divisors of 357 include 3, 7. 357 has 8 divisors; 356 has 6 and 358 has 4, so 357 wins here. 357 divided by its largest divisor, 119, gives 3.