20915257

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{229}}^1$

素因数の和:301

約数の個数: 24

約数和(自身を含む): 25237440

約数和(自身を除く): 4322183

約数列:

[1, 11, 19, 23, 209, 229, 253, 361, 437, 2519, 3971, 4351, 4807, 5267, 8303, 47861, 57937, 82669, 91333, 100073, 909359, 1100803, 1901387, 20915257]

約数ペア:

[(1, 20915257), (11, 1901387), (19, 1100803), (23, 909359), (209, 100073), (229, 91333), (253, 82669), (361, 57937), (437, 47861), (2519, 8303), (3971, 5267), (4351, 4807)]