18018680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{10987}}^1$

素因数の和:11039

約数の個数: 32

約数和(自身を含む): 41534640

約数和(自身を除く): 23515960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 10987, 21974, 43948, 54935, 87896, 109870, 219740, 439480, 450467, 900934, 1801868, 2252335, 3603736, 4504670, 9009340, 18018680]

約数ペア:

[(1, 18018680), (2, 9009340), (4, 4504670), (5, 3603736), (8, 2252335), (10, 1801868), (20, 900934), (40, 450467), (41, 439480), (82, 219740), (164, 109870), (205, 87896), (328, 54935), (410, 43948), (820, 21974), (1640, 10987)]