18917240

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6661}}^1$

素因数の和:6743

約数の個数: 32

約数和(自身を含む): 43169760

約数和(自身を除く): 24252520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6661, 13322, 26644, 33305, 53288, 66610, 133220, 266440, 472931, 945862, 1891724, 2364655, 3783448, 4729310, 9458620, 18917240]

約数ペア:

[(1, 18917240), (2, 9458620), (4, 4729310), (5, 3783448), (8, 2364655), (10, 1891724), (20, 945862), (40, 472931), (71, 266440), (142, 133220), (284, 66610), (355, 53288), (568, 33305), (710, 26644), (1420, 13322), (2840, 6661)]