21705717

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{613}}^1$

素因数の和:693

約数の個数: 32

約数和(自身を含む): 33598080

約数和(自身を除く): 11892363

約数列:

[1, 3, 11, 29, 33, 37, 87, 111, 319, 407, 613, 957, 1073, 1221, 1839, 3219, 6743, 11803, 17777, 20229, 22681, 35409, 53331, 68043, 195547, 249491, 586641, 657749, 748473, 1973247, 7235239, 21705717]

約数ペア:

[(1, 21705717), (3, 7235239), (11, 1973247), (29, 748473), (33, 657749), (37, 586641), (87, 249491), (111, 195547), (319, 68043), (407, 53331), (613, 35409), (957, 22681), (1073, 20229), (1221, 17777), (1839, 11803), (3219, 6743)]