19802255

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{461}}^1$

素因数の和:559

約数の個数: 24

約数和(自身を含む): 26544672

約数和(自身を除く): 6742417

約数列:

[1, 5, 11, 55, 71, 121, 355, 461, 605, 781, 2305, 3905, 5071, 8591, 25355, 32731, 42955, 55781, 163655, 278905, 360041, 1800205, 3960451, 19802255]

約数ペア:

[(1, 19802255), (5, 3960451), (11, 1800205), (55, 360041), (71, 278905), (121, 163655), (355, 55781), (461, 42955), (605, 32731), (781, 25355), (2305, 8591), (3905, 5071)]