21903219

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{167}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 14787981

約数列:

[1, 3, 9, 13, 19, 39, 57, 59, 117, 167, 171, 177, 247, 501, 531, 741, 767, 1121, 1503, 2171, 2223, 2301, 3173, 3363, 6513, 6903, 9519, 9853, 10089, 14573, 19539, 28557, 29559, 41249, 43719, 88677, 123747, 128089, 131157, 187207, 371241, 384267, 561621, 1152801, 1684863, 2433691, 7301073, 21903219]

約数ペア:

[(1, 21903219), (3, 7301073), (9, 2433691), (13, 1684863), (19, 1152801), (39, 561621), (57, 384267), (59, 371241), (117, 187207), (167, 131157), (171, 128089), (177, 123747), (247, 88677), (501, 43719), (531, 41249), (741, 29559), (767, 28557), (1121, 19539), (1503, 14573), (2171, 10089), (2223, 9853), (2301, 9519), (3173, 6903), (3363, 6513)]