20689119

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{647}}^1$

素因数の和:700

約数の個数: 48

約数和(自身を含む): 36391680

約数和(自身を除く): 15702561

約数列:

[1, 3, 9, 11, 17, 19, 33, 51, 57, 99, 153, 171, 187, 209, 323, 561, 627, 647, 969, 1683, 1881, 1941, 2907, 3553, 5823, 7117, 10659, 10999, 12293, 21351, 31977, 32997, 36879, 64053, 98991, 110637, 120989, 135223, 208981, 362967, 405669, 626943, 1088901, 1217007, 1880829, 2298791, 6896373, 20689119]

約数ペア:

[(1, 20689119), (3, 6896373), (9, 2298791), (11, 1880829), (17, 1217007), (19, 1088901), (33, 626943), (51, 405669), (57, 362967), (99, 208981), (153, 135223), (171, 120989), (187, 110637), (209, 98991), (323, 64053), (561, 36879), (627, 32997), (647, 31977), (969, 21351), (1683, 12293), (1881, 10999), (1941, 10659), (2907, 7117), (3553, 5823)]