21685573

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{797}}^1$

素因数の和:853

約数の個数: 24

約数和(自身を含む): 28038528

約数和(自身を除く): 6352955

約数列:

[1, 7, 13, 23, 91, 161, 169, 299, 797, 1183, 2093, 3887, 5579, 10361, 18331, 27209, 72527, 128317, 134693, 238303, 942851, 1668121, 3097939, 21685573]

約数ペア:

[(1, 21685573), (7, 3097939), (13, 1668121), (23, 942851), (91, 238303), (161, 134693), (169, 128317), (299, 72527), (797, 27209), (1183, 18331), (2093, 10361), (3887, 5579)]