21381008

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2963}}^1$

素因数の和:3023

約数の個数: 40

約数和(自身を含む): 46309536

約数和(自身を除く): 24928528

約数列:

[1, 2, 4, 8, 11, 16, 22, 41, 44, 82, 88, 164, 176, 328, 451, 656, 902, 1804, 2963, 3608, 5926, 7216, 11852, 23704, 32593, 47408, 65186, 121483, 130372, 242966, 260744, 485932, 521488, 971864, 1336313, 1943728, 2672626, 5345252, 10690504, 21381008]

約数ペア:

[(1, 21381008), (2, 10690504), (4, 5345252), (8, 2672626), (11, 1943728), (16, 1336313), (22, 971864), (41, 521488), (44, 485932), (82, 260744), (88, 242966), (164, 130372), (176, 121483), (328, 65186), (451, 47408), (656, 32593), (902, 23704), (1804, 11852), (2963, 7216), (3608, 5926)]