21133640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1117}}^1$

素因数の和:1182

約数の個数: 64

約数和(自身を含む): 53127360

約数和(自身を除く): 31993720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1117, 1720, 1892, 2234, 2365, 3784, 4468, 4730, 5585, 8936, 9460, 11170, 12287, 18920, 22340, 24574, 44680, 48031, 49148, 61435, 96062, 98296, 122870, 192124, 240155, 245740, 384248, 480310, 491480, 528341, 960620, 1056682, 1921240, 2113364, 2641705, 4226728, 5283410, 10566820, 21133640]

約数ペア:

[(1, 21133640), (2, 10566820), (4, 5283410), (5, 4226728), (8, 2641705), (10, 2113364), (11, 1921240), (20, 1056682), (22, 960620), (40, 528341), (43, 491480), (44, 480310), (55, 384248), (86, 245740), (88, 240155), (110, 192124), (172, 122870), (215, 98296), (220, 96062), (344, 61435), (430, 49148), (440, 48031), (473, 44680), (860, 24574), (946, 22340), (1117, 18920), (1720, 12287), (1892, 11170), (2234, 9460), (2365, 8936), (3784, 5585), (4468, 4730)]