18939866

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{20021}}^1$

素因数の和:20077

約数の個数: 16

約数和(自身を含む): 31714848

約数和(自身を除く): 12774982

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 20021, 40042, 220231, 440462, 860903, 1721806, 9469933, 18939866]

約数ペア:

[(1, 18939866), (2, 9469933), (11, 1721806), (22, 860903), (43, 440462), (86, 220231), (473, 40042), (946, 20021)]