18381640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10687}}^1$

素因数の和:10741

約数の個数: 32

約数和(自身を含む): 42324480

約数和(自身を除く): 23942840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 10687, 21374, 42748, 53435, 85496, 106870, 213740, 427480, 459541, 919082, 1838164, 2297705, 3676328, 4595410, 9190820, 18381640]

約数ペア:

[(1, 18381640), (2, 9190820), (4, 4595410), (5, 3676328), (8, 2297705), (10, 1838164), (20, 919082), (40, 459541), (43, 427480), (86, 213740), (172, 106870), (215, 85496), (344, 53435), (430, 42748), (860, 21374), (1720, 10687)]