20989072

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:200

約数の個数: 80

約数和(自身を含む): 47496960

約数和(自身を除く): 26507888

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 47, 52, 76, 94, 104, 113, 152, 188, 208, 226, 247, 304, 376, 452, 494, 611, 752, 893, 904, 988, 1222, 1469, 1786, 1808, 1976, 2147, 2444, 2938, 3572, 3952, 4294, 4888, 5311, 5876, 7144, 8588, 9776, 10622, 11609, 11752, 14288, 17176, 21244, 23218, 23504, 27911, 34352, 42488, 46436, 55822, 69043, 84976, 92872, 100909, 111644, 138086, 185744, 201818, 223288, 276172, 403636, 446576, 552344, 807272, 1104688, 1311817, 1614544, 2623634, 5247268, 10494536, 20989072]

約数ペア:

[(1, 20989072), (2, 10494536), (4, 5247268), (8, 2623634), (13, 1614544), (16, 1311817), (19, 1104688), (26, 807272), (38, 552344), (47, 446576), (52, 403636), (76, 276172), (94, 223288), (104, 201818), (113, 185744), (152, 138086), (188, 111644), (208, 100909), (226, 92872), (247, 84976), (304, 69043), (376, 55822), (452, 46436), (494, 42488), (611, 34352), (752, 27911), (893, 23504), (904, 23218), (988, 21244), (1222, 17176), (1469, 14288), (1786, 11752), (1808, 11609), (1976, 10622), (2147, 9776), (2444, 8588), (2938, 7144), (3572, 5876), (3952, 5311), (4294, 4888)]