18903280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21481}}^1$

素因数の和:21505

約数の個数: 40

約数和(自身を含む): 47947824

約数和(自身を除く): 29044544

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21481, 42962, 85924, 107405, 171848, 214810, 236291, 343696, 429620, 472582, 859240, 945164, 1181455, 1718480, 1890328, 2362910, 3780656, 4725820, 9451640, 18903280]

約数ペア:

[(1, 18903280), (2, 9451640), (4, 4725820), (5, 3780656), (8, 2362910), (10, 1890328), (11, 1718480), (16, 1181455), (20, 945164), (22, 859240), (40, 472582), (44, 429620), (55, 343696), (80, 236291), (88, 214810), (110, 171848), (176, 107405), (220, 85924), (440, 42962), (880, 21481)]