20984678

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{307}}^1$

素因数の和:572

約数の個数: 32

約数和(自身を含む): 37255680

約数和(自身を除く): 16271002

約数列:

[1, 2, 11, 13, 22, 26, 143, 239, 286, 307, 478, 614, 2629, 3107, 3377, 3991, 5258, 6214, 6754, 7982, 34177, 43901, 68354, 73373, 87802, 146746, 807103, 953849, 1614206, 1907698, 10492339, 20984678]

約数ペア:

[(1, 20984678), (2, 10492339), (11, 1907698), (13, 1614206), (22, 953849), (26, 807103), (143, 146746), (239, 87802), (286, 73373), (307, 68354), (478, 43901), (614, 34177), (2629, 7982), (3107, 6754), (3377, 6214), (3991, 5258)]