18756680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11437}}^1$

素因数の和:11489

約数の個数: 32

約数和(自身を含む): 43235640

約数和(自身を除く): 24478960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 11437, 22874, 45748, 57185, 91496, 114370, 228740, 457480, 468917, 937834, 1875668, 2344585, 3751336, 4689170, 9378340, 18756680]

約数ペア:

[(1, 18756680), (2, 9378340), (4, 4689170), (5, 3751336), (8, 2344585), (10, 1875668), (20, 937834), (40, 468917), (41, 457480), (82, 228740), (164, 114370), (205, 91496), (328, 57185), (410, 45748), (820, 22874), (1640, 11437)]