21000786621

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{373}}^1\times {\mathrm{18637}}^1$

素因数の和:19085

約数の個数: 32

約数和(自身を含む): 30113043840

約数和(自身を除く): 9112257219

約数列:

[1, 3, 19, 53, 57, 159, 373, 1007, 1119, 3021, 7087, 18637, 19769, 21261, 55911, 59307, 354103, 375611, 987761, 1062309, 1126833, 2963283, 6951601, 18767459, 20854803, 56302377, 132080419, 368434853, 396241257, 1105304559, 7000262207, 21000786621]

約数ペア:

[(1, 21000786621), (3, 7000262207), (19, 1105304559), (53, 396241257), (57, 368434853), (159, 132080419), (373, 56302377), (1007, 20854803), (1119, 18767459), (3021, 6951601), (7087, 2963283), (18637, 1126833), (19769, 1062309), (21261, 987761), (55911, 375611), (59307, 354103)]