21103984

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6311}}^1$

素因数の和:6349

約数の個数: 40

約数和(自身を含む): 46961280

約数和(自身を除く): 25857296

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 44, 76, 88, 152, 176, 209, 304, 418, 836, 1672, 3344, 6311, 12622, 25244, 50488, 69421, 100976, 119909, 138842, 239818, 277684, 479636, 555368, 959272, 1110736, 1318999, 1918544, 2637998, 5275996, 10551992, 21103984]

約数ペア:

[(1, 21103984), (2, 10551992), (4, 5275996), (8, 2637998), (11, 1918544), (16, 1318999), (19, 1110736), (22, 959272), (38, 555368), (44, 479636), (76, 277684), (88, 239818), (152, 138842), (176, 119909), (209, 100976), (304, 69421), (418, 50488), (836, 25244), (1672, 12622), (3344, 6311)]