20672289

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 35178624

約数和(自身を除く): 14506335

約数列:

[1, 3, 9, 11, 17, 33, 51, 71, 99, 153, 173, 187, 213, 519, 561, 639, 781, 1207, 1557, 1683, 1903, 2343, 2941, 3621, 5709, 7029, 8823, 10863, 12283, 13277, 17127, 26469, 32351, 36849, 39831, 97053, 110547, 119493, 135113, 208811, 291159, 405339, 626433, 1216017, 1879299, 2296921, 6890763, 20672289]

約数ペア:

[(1, 20672289), (3, 6890763), (9, 2296921), (11, 1879299), (17, 1216017), (33, 626433), (51, 405339), (71, 291159), (99, 208811), (153, 135113), (173, 119493), (187, 110547), (213, 97053), (519, 39831), (561, 36849), (639, 32351), (781, 26469), (1207, 17127), (1557, 13277), (1683, 12283), (1903, 10863), (2343, 8823), (2941, 7029), (3621, 5709)]