21815199

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20369}}^1$

素因数の和:20399

約数の個数: 24

約数和(自身を含む): 38132640

約数和(自身を除く): 16317441

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20369, 61107, 142583, 183321, 346273, 427749, 1038819, 1283247, 2423911, 3116457, 7271733, 21815199]

約数ペア:

[(1, 21815199), (3, 7271733), (7, 3116457), (9, 2423911), (17, 1283247), (21, 1038819), (51, 427749), (63, 346273), (119, 183321), (153, 142583), (357, 61107), (1071, 20369)]