19981818

素因数分解:

$2^1\times 3^2\times {\mathrm{557}}^1\times {\mathrm{1993}}^1$

素因数の和:2558

約数の個数: 24

約数和(自身を含む): 43393428

約数和(自身を除く): 23411610

約数列:

[1, 2, 3, 6, 9, 18, 557, 1114, 1671, 1993, 3342, 3986, 5013, 5979, 10026, 11958, 17937, 35874, 1110101, 2220202, 3330303, 6660606, 9990909, 19981818]

約数ペア:

[(1, 19981818), (2, 9990909), (3, 6660606), (6, 3330303), (9, 2220202), (18, 1110101), (557, 35874), (1114, 17937), (1671, 11958), (1993, 10026), (3342, 5979), (3986, 5013)]