21103497

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{83}}^1$

素因数の和:211

約数の個数: 40

約数和(自身を含む): 33093984

約数和(自身を除く): 11990487

約数列:

[1, 3, 9, 27, 43, 73, 81, 83, 129, 219, 249, 387, 657, 747, 1161, 1971, 2241, 3139, 3483, 3569, 5913, 6059, 6723, 9417, 10707, 18177, 28251, 32121, 54531, 84753, 96363, 163593, 254259, 260537, 289089, 490779, 781611, 2344833, 7034499, 21103497]

約数ペア:

[(1, 21103497), (3, 7034499), (9, 2344833), (27, 781611), (43, 490779), (73, 289089), (81, 260537), (83, 254259), (129, 163593), (219, 96363), (249, 84753), (387, 54531), (657, 32121), (747, 28251), (1161, 18177), (1971, 10707), (2241, 9417), (3139, 6723), (3483, 6059), (3569, 5913)]