21801340

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2417}}^1$

素因数の和:2478

約数の個数: 48

約数和(自身を含む): 51184224

約数和(自身を除く): 29382884

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2417, 4510, 4834, 9020, 9668, 12085, 24170, 26587, 48340, 53174, 99097, 106348, 132935, 198194, 265870, 396388, 495485, 531740, 990970, 1090067, 1981940, 2180134, 4360268, 5450335, 10900670, 21801340]

約数ペア:

[(1, 21801340), (2, 10900670), (4, 5450335), (5, 4360268), (10, 2180134), (11, 1981940), (20, 1090067), (22, 990970), (41, 531740), (44, 495485), (55, 396388), (82, 265870), (110, 198194), (164, 132935), (205, 106348), (220, 99097), (410, 53174), (451, 48340), (820, 26587), (902, 24170), (1804, 12085), (2255, 9668), (2417, 9020), (4510, 4834)]