9988880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11351}}^1$

素因数の和:11375

約数の個数: 40

約数和(自身を含む): 25337664

約数和(自身を除く): 15348784

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 11351, 22702, 45404, 56755, 90808, 113510, 124861, 181616, 227020, 249722, 454040, 499444, 624305, 908080, 998888, 1248610, 1997776, 2497220, 4994440, 9988880]

約数ペア:

[(1, 9988880), (2, 4994440), (4, 2497220), (5, 1997776), (8, 1248610), (10, 998888), (11, 908080), (16, 624305), (20, 499444), (22, 454040), (40, 249722), (44, 227020), (55, 181616), (80, 124861), (88, 113510), (110, 90808), (176, 56755), (220, 45404), (440, 22702), (880, 11351)]