21684080

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{601}}^1$

素因数の和:666

約数の個数: 80

約数和(自身を含む): 56433888

約数和(自身を除く): 34749808

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 80, 82, 88, 110, 164, 176, 205, 220, 328, 410, 440, 451, 601, 656, 820, 880, 902, 1202, 1640, 1804, 2255, 2404, 3005, 3280, 3608, 4510, 4808, 6010, 6611, 7216, 9020, 9616, 12020, 13222, 18040, 24040, 24641, 26444, 33055, 36080, 48080, 49282, 52888, 66110, 98564, 105776, 123205, 132220, 197128, 246410, 264440, 271051, 394256, 492820, 528880, 542102, 985640, 1084204, 1355255, 1971280, 2168408, 2710510, 4336816, 5421020, 10842040, 21684080]

約数ペア:

[(1, 21684080), (2, 10842040), (4, 5421020), (5, 4336816), (8, 2710510), (10, 2168408), (11, 1971280), (16, 1355255), (20, 1084204), (22, 985640), (40, 542102), (41, 528880), (44, 492820), (55, 394256), (80, 271051), (82, 264440), (88, 246410), (110, 197128), (164, 132220), (176, 123205), (205, 105776), (220, 98564), (328, 66110), (410, 52888), (440, 49282), (451, 48080), (601, 36080), (656, 33055), (820, 26444), (880, 24641), (902, 24040), (1202, 18040), (1640, 13222), (1804, 12020), (2255, 9616), (2404, 9020), (3005, 7216), (3280, 6611), (3608, 6010), (4510, 4808)]