20657864

素因数分解:

$2^3\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{311}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 42793920

約数和(自身を除く): 22136056

約数列:

[1, 2, 4, 8, 19, 23, 38, 46, 76, 92, 152, 184, 311, 361, 437, 622, 722, 874, 1244, 1444, 1748, 2488, 2888, 3496, 5909, 7153, 8303, 11818, 14306, 16606, 23636, 28612, 33212, 47272, 57224, 66424, 112271, 135907, 224542, 271814, 449084, 543628, 898168, 1087256, 2582233, 5164466, 10328932, 20657864]

約数ペア:

[(1, 20657864), (2, 10328932), (4, 5164466), (8, 2582233), (19, 1087256), (23, 898168), (38, 543628), (46, 449084), (76, 271814), (92, 224542), (152, 135907), (184, 112271), (311, 66424), (361, 57224), (437, 47272), (622, 33212), (722, 28612), (874, 23636), (1244, 16606), (1444, 14306), (1748, 11818), (2488, 8303), (2888, 7153), (3496, 5909)]