19888165

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{463}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 26659584

約数和(自身を除く): 6771419

約数列:

[1, 5, 11, 55, 71, 121, 355, 463, 605, 781, 2315, 3905, 5093, 8591, 25465, 32873, 42955, 56023, 164365, 280115, 361603, 1808015, 3977633, 19888165]

約数ペア:

[(1, 19888165), (5, 3977633), (11, 1808015), (55, 361603), (71, 280115), (121, 164365), (355, 56023), (463, 42955), (605, 32873), (781, 25465), (2315, 8591), (3905, 5093)]