21413288

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{1999}}^1$

素因数の和:2121

約数の個数: 32

約数和(自身を含む): 43680000

約数和(自身を除く): 22266712

約数列:

[1, 2, 4, 8, 13, 26, 52, 103, 104, 206, 412, 824, 1339, 1999, 2678, 3998, 5356, 7996, 10712, 15992, 25987, 51974, 103948, 205897, 207896, 411794, 823588, 1647176, 2676661, 5353322, 10706644, 21413288]

約数ペア:

[(1, 21413288), (2, 10706644), (4, 5353322), (8, 2676661), (13, 1647176), (26, 823588), (52, 411794), (103, 207896), (104, 205897), (206, 103948), (412, 51974), (824, 25987), (1339, 15992), (1999, 10712), (2678, 7996), (3998, 5356)]