21793915

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 32979744

約数和(自身を除く): 11185829

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 121, 143, 163, 187, 221, 605, 715, 815, 935, 1105, 1573, 1793, 2057, 2119, 2431, 2771, 7865, 8965, 10285, 10595, 12155, 13855, 19723, 23309, 26741, 30481, 36023, 98615, 116545, 133705, 152405, 180115, 256399, 335291, 396253, 1281995, 1676455, 1981265, 4358783, 21793915]

約数ペア:

[(1, 21793915), (5, 4358783), (11, 1981265), (13, 1676455), (17, 1281995), (55, 396253), (65, 335291), (85, 256399), (121, 180115), (143, 152405), (163, 133705), (187, 116545), (221, 98615), (605, 36023), (715, 30481), (815, 26741), (935, 23309), (1105, 19723), (1573, 13855), (1793, 12155), (2057, 10595), (2119, 10285), (2431, 8965), (2771, 7865)]