21098680

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8647}}^1$

素因数の和:8719

約数の個数: 32

約数和(自身を含む): 48255840

約数和(自身を除く): 27157160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8647, 17294, 34588, 43235, 69176, 86470, 172940, 345880, 527467, 1054934, 2109868, 2637335, 4219736, 5274670, 10549340, 21098680]

約数ペア:

[(1, 21098680), (2, 10549340), (4, 5274670), (5, 4219736), (8, 2637335), (10, 2109868), (20, 1054934), (40, 527467), (61, 345880), (122, 172940), (244, 86470), (305, 69176), (488, 43235), (610, 34588), (1220, 17294), (2440, 8647)]