18980720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21569}}^1$

素因数の和:21593

約数の個数: 40

約数和(自身を含む): 48144240

約数和(自身を除く): 29163520

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21569, 43138, 86276, 107845, 172552, 215690, 237259, 345104, 431380, 474518, 862760, 949036, 1186295, 1725520, 1898072, 2372590, 3796144, 4745180, 9490360, 18980720]

約数ペア:

[(1, 18980720), (2, 9490360), (4, 4745180), (5, 3796144), (8, 2372590), (10, 1898072), (11, 1725520), (16, 1186295), (20, 949036), (22, 862760), (40, 474518), (44, 431380), (55, 345104), (80, 237259), (88, 215690), (110, 172552), (176, 107845), (220, 86276), (440, 43138), (880, 21569)]