18916804557

素因数分解:

$3^4\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{157}}^1$

素因数の和:361

約数の個数: 160

約数和(自身を含む): 34225196544

約数和(自身を除く): 15308391987

約数列:

[1, 3, 7, 9, 21, 27, 41, 63, 71, 73, 81, 123, 157, 189, 213, 219, 287, 369, 471, 497, 511, 567, 639, 657, 861, 1099, 1107, 1413, 1491, 1533, 1917, 1971, 2583, 2911, 2993, 3297, 3321, 4239, 4473, 4599, 5183, 5751, 5913, 6437, 7749, 8733, 8979, 9891, 11147, 11461, 12717, 13419, 13797, 15549, 19311, 20377, 20951, 23247, 26199, 26937, 29673, 33441, 34383, 36281, 40257, 41391, 45059, 46647, 57933, 61131, 62853, 78029, 78597, 80227, 80811, 89019, 100323, 103149, 108843, 135177, 139941, 173799, 183393, 188559, 212503, 234087, 235791, 240681, 242433, 300969, 309447, 326529, 405531, 419823, 457027, 469901, 521397, 550179, 565677, 637509, 702261, 722043, 813731, 902907, 928341, 979587, 1216593, 1371081, 1409703, 1487521, 1650537, 1697031, 1912527, 2106783, 2166129, 2441193, 2938761, 3199189, 3289307, 3649779, 4113243, 4229109, 4462563, 5696117, 5737581, 6320349, 6498387, 7323579, 9597567, 9867921, 12339729, 12687327, 13387689, 17088351, 17212743, 21970737, 28792701, 29603763, 33362971, 37019187, 38061981, 40163067, 51265053, 65912211, 86378103, 88811289, 100088913, 120489201, 153795159, 233540797, 259134309, 266433867, 300266739, 461385477, 700622391, 900800217, 2101867173, 2702400651, 6305601519, 18916804557]

約数ペア:

[(1, 18916804557), (3, 6305601519), (7, 2702400651), (9, 2101867173), (21, 900800217), (27, 700622391), (41, 461385477), (63, 300266739), (71, 266433867), (73, 259134309), (81, 233540797), (123, 153795159), (157, 120489201), (189, 100088913), (213, 88811289), (219, 86378103), (287, 65912211), (369, 51265053), (471, 40163067), (497, 38061981), (511, 37019187), (567, 33362971), (639, 29603763), (657, 28792701), (861, 21970737), (1099, 17212743), (1107, 17088351), (1413, 13387689), (1491, 12687327), (1533, 12339729), (1917, 9867921), (1971, 9597567), (2583, 7323579), (2911, 6498387), (2993, 6320349), (3297, 5737581), (3321, 5696117), (4239, 4462563), (4473, 4229109), (4599, 4113243), (5183, 3649779), (5751, 3289307), (5913, 3199189), (6437, 2938761), (7749, 2441193), (8733, 2166129), (8979, 2106783), (9891, 1912527), (11147, 1697031), (11461, 1650537), (12717, 1487521), (13419, 1409703), (13797, 1371081), (15549, 1216593), (19311, 979587), (20377, 928341), (20951, 902907), (23247, 813731), (26199, 722043), (26937, 702261), (29673, 637509), (33441, 565677), (34383, 550179), (36281, 521397), (40257, 469901), (41391, 457027), (45059, 419823), (46647, 405531), (57933, 326529), (61131, 309447), (62853, 300969), (78029, 242433), (78597, 240681), (80227, 235791), (80811, 234087), (89019, 212503), (100323, 188559), (103149, 183393), (108843, 173799), (135177, 139941)]