21991736

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{2053}}^1$

素因数の和:2175

約数の個数: 32

約数和(自身を含む): 44859360

約数和(自身を除く): 22867624

約数列:

[1, 2, 4, 8, 13, 26, 52, 103, 104, 206, 412, 824, 1339, 2053, 2678, 4106, 5356, 8212, 10712, 16424, 26689, 53378, 106756, 211459, 213512, 422918, 845836, 1691672, 2748967, 5497934, 10995868, 21991736]

約数ペア:

[(1, 21991736), (2, 10995868), (4, 5497934), (8, 2748967), (13, 1691672), (26, 845836), (52, 422918), (103, 213512), (104, 211459), (206, 106756), (412, 53378), (824, 26689), (1339, 16424), (2053, 10712), (2678, 8212), (4106, 5356)]