18811720

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{16217}}^1$

素因数の和:16257

約数の個数: 32

約数和(自身を含む): 43788600

約数和(自身を除く): 24976880

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 16217, 32434, 64868, 81085, 129736, 162170, 324340, 470293, 648680, 940586, 1881172, 2351465, 3762344, 4702930, 9405860, 18811720]

約数ペア:

[(1, 18811720), (2, 9405860), (4, 4702930), (5, 3762344), (8, 2351465), (10, 1881172), (20, 940586), (29, 648680), (40, 470293), (58, 324340), (116, 162170), (145, 129736), (232, 81085), (290, 64868), (580, 32434), (1160, 16217)]