20218520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{443}}^1$

素因数の和:624

約数の個数: 64

約数和(自身を含む): 52427520

約数和(自身を除く): 32209000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 163, 280, 326, 443, 652, 815, 886, 1141, 1304, 1630, 1772, 2215, 2282, 3101, 3260, 3544, 4430, 4564, 5705, 6202, 6520, 8860, 9128, 11410, 12404, 15505, 17720, 22820, 24808, 31010, 45640, 62020, 72209, 124040, 144418, 288836, 361045, 505463, 577672, 722090, 1010926, 1444180, 2021852, 2527315, 2888360, 4043704, 5054630, 10109260, 20218520]

約数ペア:

[(1, 20218520), (2, 10109260), (4, 5054630), (5, 4043704), (7, 2888360), (8, 2527315), (10, 2021852), (14, 1444180), (20, 1010926), (28, 722090), (35, 577672), (40, 505463), (56, 361045), (70, 288836), (140, 144418), (163, 124040), (280, 72209), (326, 62020), (443, 45640), (652, 31010), (815, 24808), (886, 22820), (1141, 17720), (1304, 15505), (1630, 12404), (1772, 11410), (2215, 9128), (2282, 8860), (3101, 6520), (3260, 6202), (3544, 5705), (4430, 4564)]