28108340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{108109}}^1$

素因数の和:108131

約数の個数: 24

約数和(自身を含む): 63568680

約数和(自身を除く): 35460340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 108109, 216218, 432436, 540545, 1081090, 1405417, 2162180, 2810834, 5621668, 7027085, 14054170, 28108340]

約数ペア:

[(1, 28108340), (2, 14054170), (4, 7027085), (5, 5621668), (10, 2810834), (13, 2162180), (20, 1405417), (26, 1081090), (52, 540545), (65, 432436), (130, 216218), (260, 108109)]