18722920

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{433}}^1$

素因数の和:514

約数の個数: 64

約数和(自身を含む): 44997120

約数和(自身を除く): 26274200

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 47, 92, 94, 115, 184, 188, 230, 235, 376, 433, 460, 470, 866, 920, 940, 1081, 1732, 1880, 2162, 2165, 3464, 4324, 4330, 5405, 8648, 8660, 9959, 10810, 17320, 19918, 20351, 21620, 39836, 40702, 43240, 49795, 79672, 81404, 99590, 101755, 162808, 199180, 203510, 398360, 407020, 468073, 814040, 936146, 1872292, 2340365, 3744584, 4680730, 9361460, 18722920]

約数ペア:

[(1, 18722920), (2, 9361460), (4, 4680730), (5, 3744584), (8, 2340365), (10, 1872292), (20, 936146), (23, 814040), (40, 468073), (46, 407020), (47, 398360), (92, 203510), (94, 199180), (115, 162808), (184, 101755), (188, 99590), (230, 81404), (235, 79672), (376, 49795), (433, 43240), (460, 40702), (470, 39836), (866, 21620), (920, 20351), (940, 19918), (1081, 17320), (1732, 10810), (1880, 9959), (2162, 8660), (2165, 8648), (3464, 5405), (4324, 4330)]