21219471

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{1993}}^1$

素因数の和:2032

約数の個数: 36

約数和(自身を含む): 37949808

約数和(自身を除く): 16730337

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 169, 273, 507, 819, 1183, 1521, 1993, 3549, 5979, 10647, 13951, 17937, 25909, 41853, 77727, 125559, 181363, 233181, 336817, 544089, 1010451, 1632267, 2357719, 3031353, 7073157, 21219471]

約数ペア:

[(1, 21219471), (3, 7073157), (7, 3031353), (9, 2357719), (13, 1632267), (21, 1010451), (39, 544089), (63, 336817), (91, 233181), (117, 181363), (169, 125559), (273, 77727), (507, 41853), (819, 25909), (1183, 17937), (1521, 13951), (1993, 10647), (3549, 5979)]