18885340

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8663}}^1$

素因数の和:8781

約数の個数: 24

約数和(自身を含む): 40027680

約数和(自身を除く): 21142340

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8663, 17326, 34652, 43315, 86630, 173260, 944267, 1888534, 3777068, 4721335, 9442670, 18885340]

約数ペア:

[(1, 18885340), (2, 9442670), (4, 4721335), (5, 3777068), (10, 1888534), (20, 944267), (109, 173260), (218, 86630), (436, 43315), (545, 34652), (1090, 17326), (2180, 8663)]