18880888

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2557}}^1$

素因数の和:2647

約数の個数: 32

約数和(自身を含む): 38676960

約数和(自身を除く): 19796072

約数列:

[1, 2, 4, 8, 13, 26, 52, 71, 104, 142, 284, 568, 923, 1846, 2557, 3692, 5114, 7384, 10228, 20456, 33241, 66482, 132964, 181547, 265928, 363094, 726188, 1452376, 2360111, 4720222, 9440444, 18880888]

約数ペア:

[(1, 18880888), (2, 9440444), (4, 4720222), (8, 2360111), (13, 1452376), (26, 726188), (52, 363094), (71, 265928), (104, 181547), (142, 132964), (284, 66482), (568, 33241), (923, 20456), (1846, 10228), (2557, 7384), (3692, 5114)]