18037640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10487}}^1$

素因数の和:10541

約数の個数: 32

約数和(自身を含む): 41532480

約数和(自身を除く): 23494840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 10487, 20974, 41948, 52435, 83896, 104870, 209740, 419480, 450941, 901882, 1803764, 2254705, 3607528, 4509410, 9018820, 18037640]

約数ペア:

[(1, 18037640), (2, 9018820), (4, 4509410), (5, 3607528), (8, 2254705), (10, 1803764), (20, 901882), (40, 450941), (43, 419480), (86, 209740), (172, 104870), (215, 83896), (344, 52435), (430, 41948), (860, 20974), (1720, 10487)]