20212016

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2801}}^1$

素因数の和:2861

約数の個数: 40

約数和(自身を含む): 43778448

約数和(自身を除く): 23566432

約数列:

[1, 2, 4, 8, 11, 16, 22, 41, 44, 82, 88, 164, 176, 328, 451, 656, 902, 1804, 2801, 3608, 5602, 7216, 11204, 22408, 30811, 44816, 61622, 114841, 123244, 229682, 246488, 459364, 492976, 918728, 1263251, 1837456, 2526502, 5053004, 10106008, 20212016]

約数ペア:

[(1, 20212016), (2, 10106008), (4, 5053004), (8, 2526502), (11, 1837456), (16, 1263251), (22, 918728), (41, 492976), (44, 459364), (82, 246488), (88, 229682), (164, 123244), (176, 114841), (328, 61622), (451, 44816), (656, 30811), (902, 22408), (1804, 11204), (2801, 7216), (3608, 5602)]