18128560

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{5527}}^1$

素因数の和:5581

約数の個数: 40

約数和(自身を含む): 43184736

約数和(自身を除く): 25056176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 5527, 11054, 22108, 27635, 44216, 55270, 88432, 110540, 221080, 226607, 442160, 453214, 906428, 1133035, 1812856, 2266070, 3625712, 4532140, 9064280, 18128560]

約数ペア:

[(1, 18128560), (2, 9064280), (4, 4532140), (5, 3625712), (8, 2266070), (10, 1812856), (16, 1133035), (20, 906428), (40, 453214), (41, 442160), (80, 226607), (82, 221080), (164, 110540), (205, 88432), (328, 55270), (410, 44216), (656, 27635), (820, 22108), (1640, 11054), (3280, 5527)]