20640672

素因数分解:

$2^5\times 3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:215

約数の個数: 144

約数和(自身を含む): 65356200

約数和(自身を除く): 44715528

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 32, 36, 37, 39, 48, 52, 72, 74, 78, 96, 104, 111, 117, 144, 148, 149, 156, 208, 222, 234, 288, 296, 298, 312, 333, 416, 444, 447, 468, 481, 592, 596, 624, 666, 888, 894, 936, 962, 1184, 1192, 1248, 1332, 1341, 1443, 1776, 1788, 1872, 1924, 1937, 2384, 2664, 2682, 2886, 3552, 3576, 3744, 3848, 3874, 4329, 4768, 5328, 5364, 5513, 5772, 5811, 7152, 7696, 7748, 8658, 10656, 10728, 11026, 11544, 11622, 14304, 15392, 15496, 16539, 17316, 17433, 21456, 22052, 23088, 23244, 30992, 33078, 34632, 34866, 42912, 44104, 46176, 46488, 49617, 61984, 66156, 69264, 69732, 71669, 88208, 92976, 99234, 132312, 138528, 139464, 143338, 176416, 185952, 198468, 215007, 264624, 278928, 286676, 396936, 430014, 529248, 557856, 573352, 645021, 793872, 860028, 1146704, 1290042, 1587744, 1720056, 2293408, 2580084, 3440112, 5160168, 6880224, 10320336, 20640672]

約数ペア:

[(1, 20640672), (2, 10320336), (3, 6880224), (4, 5160168), (6, 3440112), (8, 2580084), (9, 2293408), (12, 1720056), (13, 1587744), (16, 1290042), (18, 1146704), (24, 860028), (26, 793872), (32, 645021), (36, 573352), (37, 557856), (39, 529248), (48, 430014), (52, 396936), (72, 286676), (74, 278928), (78, 264624), (96, 215007), (104, 198468), (111, 185952), (117, 176416), (144, 143338), (148, 139464), (149, 138528), (156, 132312), (208, 99234), (222, 92976), (234, 88208), (288, 71669), (296, 69732), (298, 69264), (312, 66156), (333, 61984), (416, 49617), (444, 46488), (447, 46176), (468, 44104), (481, 42912), (592, 34866), (596, 34632), (624, 33078), (666, 30992), (888, 23244), (894, 23088), (936, 22052), (962, 21456), (1184, 17433), (1192, 17316), (1248, 16539), (1332, 15496), (1341, 15392), (1443, 14304), (1776, 11622), (1788, 11544), (1872, 11026), (1924, 10728), (1937, 10656), (2384, 8658), (2664, 7748), (2682, 7696), (2886, 7152), (3552, 5811), (3576, 5772), (3744, 5513), (3848, 5364), (3874, 5328), (4329, 4768)]