21902881

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{21881}}^1$

素因数の和:21912

約数の個数: 16

約数和(自身を含む): 29409408

約数和(自身を除く): 7506527

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 21881, 153167, 240691, 284453, 1684837, 1991171, 3128983, 21902881]

約数ペア:

[(1, 21902881), (7, 3128983), (11, 1991171), (13, 1684837), (77, 284453), (91, 240691), (143, 153167), (1001, 21881)]