21240939

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{3821}}^1$

素因数の和:3950

約数の個数: 16

約数和(自身を含む): 30270240

約数和(自身を除く): 9029301

約数列:

[1, 3, 17, 51, 109, 327, 1853, 3821, 5559, 11463, 64957, 194871, 416489, 1249467, 7080313, 21240939]

約数ペア:

[(1, 21240939), (3, 7080313), (17, 1249467), (51, 416489), (109, 194871), (327, 64957), (1853, 11463), (3821, 5559)]