18121060

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1109}}^1$

素因数の和:1180

約数の個数: 48

約数和(自身を含む): 41025600

約数和(自身を除く): 22904540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1109, 1634, 2218, 3268, 4085, 4436, 5545, 8170, 11090, 16340, 21071, 22180, 42142, 47687, 84284, 95374, 105355, 190748, 210710, 238435, 421420, 476870, 906053, 953740, 1812106, 3624212, 4530265, 9060530, 18121060]

約数ペア:

[(1, 18121060), (2, 9060530), (4, 4530265), (5, 3624212), (10, 1812106), (19, 953740), (20, 906053), (38, 476870), (43, 421420), (76, 238435), (86, 210710), (95, 190748), (172, 105355), (190, 95374), (215, 84284), (380, 47687), (430, 42142), (817, 22180), (860, 21071), (1109, 16340), (1634, 11090), (2218, 8170), (3268, 5545), (4085, 4436)]