21855897

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20407}}^1$

素因数の和:20437

約数の個数: 24

約数和(自身を含む): 38203776

約数和(自身を除く): 16347879

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20407, 61221, 142849, 183663, 346919, 428547, 1040757, 1285641, 2428433, 3122271, 7285299, 21855897]

約数ペア:

[(1, 21855897), (3, 7285299), (7, 3122271), (9, 2428433), (17, 1285641), (21, 1040757), (51, 428547), (63, 346919), (119, 183663), (153, 142849), (357, 61221), (1071, 20407)]