20987499

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{359}}^1\times {\mathrm{1499}}^1$

素因数の和:1874

約数の個数: 16

約数和(自身を含む): 30240000

約数和(自身を除く): 9252501

約数列:

[1, 3, 13, 39, 359, 1077, 1499, 4497, 4667, 14001, 19487, 58461, 538141, 1614423, 6995833, 20987499]

約数ペア:

[(1, 20987499), (3, 6995833), (13, 1614423), (39, 538141), (359, 58461), (1077, 19487), (1499, 14001), (4497, 4667)]