21987171

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{1097}}^1$

素因数の和:1251

約数の個数: 24

約数和(自身を含む): 33915024

約数和(自身を除く): 11927853

約数列:

[1, 3, 9, 17, 51, 131, 153, 393, 1097, 1179, 2227, 3291, 6681, 9873, 18649, 20043, 55947, 143707, 167841, 431121, 1293363, 2443019, 7329057, 21987171]

約数ペア:

[(1, 21987171), (3, 7329057), (9, 2443019), (17, 1293363), (51, 431121), (131, 167841), (153, 143707), (393, 55947), (1097, 20043), (1179, 18649), (2227, 9873), (3291, 6681)]