21782890

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53129}}^1$

素因数の和:53177

約数の個数: 16

約数和(自身を含む): 40166280

約数和(自身を除く): 18383390

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 53129, 106258, 265645, 531290, 2178289, 4356578, 10891445, 21782890]

約数ペア:

[(1, 21782890), (2, 10891445), (5, 4356578), (10, 2178289), (41, 531290), (82, 265645), (205, 106258), (410, 53129)]