638881992

素因数分解:

$2^3\times 3^5\times 7^2\times {\mathrm{19}}^1\times {\mathrm{353}}^1$

素因数の和:407

約数の個数: 288

約数和(自身を含む): 2203437600

約数和(自身を除く): 1564555608

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 19, 21, 24, 27, 28, 36, 38, 42, 49, 54, 56, 57, 63, 72, 76, 81, 84, 98, 108, 114, 126, 133, 147, 152, 162, 168, 171, 189, 196, 216, 228, 243, 252, 266, 294, 324, 342, 353, 378, 392, 399, 441, 456, 486, 504, 513, 532, 567, 588, 648, 684, 706, 756, 798, 882, 931, 972, 1026, 1059, 1064, 1134, 1176, 1197, 1323, 1368, 1412, 1512, 1539, 1596, 1701, 1764, 1862, 1944, 2052, 2118, 2268, 2394, 2471, 2646, 2793, 2824, 3078, 3177, 3192, 3402, 3528, 3591, 3724, 3969, 4104, 4236, 4536, 4617, 4788, 4942, 5292, 5586, 6156, 6354, 6707, 6804, 7182, 7413, 7448, 7938, 8379, 8472, 9234, 9531, 9576, 9884, 10584, 10773, 11172, 11907, 12312, 12708, 13414, 13608, 14364, 14826, 15876, 16758, 17297, 18468, 19062, 19768, 20121, 21546, 22239, 22344, 23814, 25137, 25416, 26828, 28593, 28728, 29652, 31752, 32319, 33516, 34594, 36936, 38124, 40242, 43092, 44478, 46949, 47628, 50274, 51891, 53656, 57186, 59304, 60363, 64638, 66717, 67032, 69188, 75411, 76248, 80484, 85779, 86184, 88956, 93898, 95256, 100548, 103782, 114372, 120726, 129276, 133434, 138376, 140847, 150822, 155673, 160968, 171558, 177912, 181089, 187796, 200151, 201096, 207564, 226233, 228744, 241452, 258552, 266868, 281694, 301644, 311346, 328643, 343116, 362178, 375592, 400302, 415128, 422541, 452466, 467019, 482904, 533736, 543267, 563388, 600453, 603288, 622692, 657286, 686232, 724356, 800604, 845082, 904932, 934038, 985929, 1086534, 1126776, 1200906, 1245384, 1267623, 1314572, 1401057, 1448712, 1601208, 1629801, 1690164, 1809864, 1868076, 1971858, 2173068, 2401812, 2535246, 2629144, 2802114, 2957787, 3259602, 3380328, 3736152, 3802869, 3943716, 4203171, 4346136, 4803624, 5070492, 5604228, 5915574, 6519204, 7605738, 7887432, 8406342, 8873361, 10140984, 11208456, 11408607, 11831148, 13038408, 15211476, 16812684, 17746722, 22817214, 23662296, 26620083, 30422952, 33625368, 35493444, 45634428, 53240166, 70986888, 79860249, 91268856, 106480332, 159720498, 212960664, 319440996, 638881992]

約数ペア:

[(1, 638881992), (2, 319440996), (3, 212960664), (4, 159720498), (6, 106480332), (7, 91268856), (8, 79860249), (9, 70986888), (12, 53240166), (14, 45634428), (18, 35493444), (19, 33625368), (21, 30422952), (24, 26620083), (27, 23662296), (28, 22817214), (36, 17746722), (38, 16812684), (42, 15211476), (49, 13038408), (54, 11831148), (56, 11408607), (57, 11208456), (63, 10140984), (72, 8873361), (76, 8406342), (81, 7887432), (84, 7605738), (98, 6519204), (108, 5915574), (114, 5604228), (126, 5070492), (133, 4803624), (147, 4346136), (152, 4203171), (162, 3943716), (168, 3802869), (171, 3736152), (189, 3380328), (196, 3259602), (216, 2957787), (228, 2802114), (243, 2629144), (252, 2535246), (266, 2401812), (294, 2173068), (324, 1971858), (342, 1868076), (353, 1809864), (378, 1690164), (392, 1629801), (399, 1601208), (441, 1448712), (456, 1401057), (486, 1314572), (504, 1267623), (513, 1245384), (532, 1200906), (567, 1126776), (588, 1086534), (648, 985929), (684, 934038), (706, 904932), (756, 845082), (798, 800604), (882, 724356), (931, 686232), (972, 657286), (1026, 622692), (1059, 603288), (1064, 600453), (1134, 563388), (1176, 543267), (1197, 533736), (1323, 482904), (1368, 467019), (1412, 452466), (1512, 422541), (1539, 415128), (1596, 400302), (1701, 375592), (1764, 362178), (1862, 343116), (1944, 328643), (2052, 311346), (2118, 301644), (2268, 281694), (2394, 266868), (2471, 258552), (2646, 241452), (2793, 228744), (2824, 226233), (3078, 207564), (3177, 201096), (3192, 200151), (3402, 187796), (3528, 181089), (3591, 177912), (3724, 171558), (3969, 160968), (4104, 155673), (4236, 150822), (4536, 140847), (4617, 138376), (4788, 133434), (4942, 129276), (5292, 120726), (5586, 114372), (6156, 103782), (6354, 100548), (6707, 95256), (6804, 93898), (7182, 88956), (7413, 86184), (7448, 85779), (7938, 80484), (8379, 76248), (8472, 75411), (9234, 69188), (9531, 67032), (9576, 66717), (9884, 64638), (10584, 60363), (10773, 59304), (11172, 57186), (11907, 53656), (12312, 51891), (12708, 50274), (13414, 47628), (13608, 46949), (14364, 44478), (14826, 43092), (15876, 40242), (16758, 38124), (17297, 36936), (18468, 34594), (19062, 33516), (19768, 32319), (20121, 31752), (21546, 29652), (22239, 28728), (22344, 28593), (23814, 26828), (25137, 25416)]