21886403

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 28864512

約数和(自身を除く): 6978109

約数列:

[1, 7, 11, 31, 53, 77, 173, 217, 341, 371, 583, 1211, 1643, 1903, 2387, 4081, 5363, 9169, 11501, 13321, 18073, 37541, 58993, 64183, 100859, 126511, 284239, 412951, 706013, 1989673, 3126629, 21886403]

約数ペア:

[(1, 21886403), (7, 3126629), (11, 1989673), (31, 706013), (53, 412951), (77, 284239), (173, 126511), (217, 100859), (341, 64183), (371, 58993), (583, 37541), (1211, 18073), (1643, 13321), (1903, 11501), (2387, 9169), (4081, 5363)]