20978328

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{647}}^1$

素因数の和:856

約数の個数: 64

約数和(自身を含む): 60341760

約数和(自身を除く): 39363432

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168, 193, 386, 579, 647, 772, 1158, 1294, 1351, 1544, 1941, 2316, 2588, 2702, 3882, 4053, 4529, 4632, 5176, 5404, 7764, 8106, 9058, 10808, 13587, 15528, 16212, 18116, 27174, 32424, 36232, 54348, 108696, 124871, 249742, 374613, 499484, 749226, 874097, 998968, 1498452, 1748194, 2622291, 2996904, 3496388, 5244582, 6992776, 10489164, 20978328]

約数ペア:

[(1, 20978328), (2, 10489164), (3, 6992776), (4, 5244582), (6, 3496388), (7, 2996904), (8, 2622291), (12, 1748194), (14, 1498452), (21, 998968), (24, 874097), (28, 749226), (42, 499484), (56, 374613), (84, 249742), (168, 124871), (193, 108696), (386, 54348), (579, 36232), (647, 32424), (772, 27174), (1158, 18116), (1294, 16212), (1351, 15528), (1544, 13587), (1941, 10808), (2316, 9058), (2588, 8106), (2702, 7764), (3882, 5404), (4053, 5176), (4529, 4632)]