20017811

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{71}}^2$

素因数の和:191

約数の個数: 18

約数和(自身を含む): 23376636

約数和(自身を除く): 3358825

約数列:

[1, 11, 19, 71, 209, 361, 781, 1349, 3971, 5041, 14839, 25631, 55451, 95779, 281941, 1053569, 1819801, 20017811]

約数ペア:

[(1, 20017811), (11, 1819801), (19, 1053569), (71, 281941), (209, 95779), (361, 55451), (781, 25631), (1349, 14839), (3971, 5041)]