18716720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21269}}^1$

素因数の和:21293

約数の個数: 40

約数和(自身を含む): 47474640

約数和(自身を除く): 28757920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21269, 42538, 85076, 106345, 170152, 212690, 233959, 340304, 425380, 467918, 850760, 935836, 1169795, 1701520, 1871672, 2339590, 3743344, 4679180, 9358360, 18716720]

約数ペア:

[(1, 18716720), (2, 9358360), (4, 4679180), (5, 3743344), (8, 2339590), (10, 1871672), (11, 1701520), (16, 1169795), (20, 935836), (22, 850760), (40, 467918), (44, 425380), (55, 340304), (80, 233959), (88, 212690), (110, 170152), (176, 106345), (220, 85076), (440, 42538), (880, 21269)]