18917991

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2027}}^1$

素因数の和:2111

約数の個数: 24

約数和(自身を含む): 29422224

約数和(自身を除く): 10504233

約数列:

[1, 3, 9, 17, 51, 61, 153, 183, 549, 1037, 2027, 3111, 6081, 9333, 18243, 34459, 103377, 123647, 310131, 370941, 1112823, 2101999, 6305997, 18917991]

約数ペア:

[(1, 18917991), (3, 6305997), (9, 2101999), (17, 1112823), (51, 370941), (61, 310131), (153, 123647), (183, 103377), (549, 34459), (1037, 18243), (2027, 9333), (3111, 6081)]