20988576

素因数分解:

$2^5\times 3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{359}}^1$

素因数の和:411

約数の個数: 144

約数和(自身を含む): 70761600

約数和(自身を除く): 49773024

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 29, 32, 36, 42, 48, 56, 58, 63, 72, 84, 87, 96, 112, 116, 126, 144, 168, 174, 203, 224, 232, 252, 261, 288, 336, 348, 359, 406, 464, 504, 522, 609, 672, 696, 718, 812, 928, 1008, 1044, 1077, 1218, 1392, 1436, 1624, 1827, 2016, 2088, 2154, 2436, 2513, 2784, 2872, 3231, 3248, 3654, 4176, 4308, 4872, 5026, 5744, 6462, 6496, 7308, 7539, 8352, 8616, 9744, 10052, 10411, 11488, 12924, 14616, 15078, 17232, 19488, 20104, 20822, 22617, 25848, 29232, 30156, 31233, 34464, 40208, 41644, 45234, 51696, 58464, 60312, 62466, 72877, 80416, 83288, 90468, 93699, 103392, 120624, 124932, 145754, 166576, 180936, 187398, 218631, 241248, 249864, 291508, 333152, 361872, 374796, 437262, 499728, 583016, 655893, 723744, 749592, 874524, 999456, 1166032, 1311786, 1499184, 1749048, 2332064, 2623572, 2998368, 3498096, 5247144, 6996192, 10494288, 20988576]

約数ペア:

[(1, 20988576), (2, 10494288), (3, 6996192), (4, 5247144), (6, 3498096), (7, 2998368), (8, 2623572), (9, 2332064), (12, 1749048), (14, 1499184), (16, 1311786), (18, 1166032), (21, 999456), (24, 874524), (28, 749592), (29, 723744), (32, 655893), (36, 583016), (42, 499728), (48, 437262), (56, 374796), (58, 361872), (63, 333152), (72, 291508), (84, 249864), (87, 241248), (96, 218631), (112, 187398), (116, 180936), (126, 166576), (144, 145754), (168, 124932), (174, 120624), (203, 103392), (224, 93699), (232, 90468), (252, 83288), (261, 80416), (288, 72877), (336, 62466), (348, 60312), (359, 58464), (406, 51696), (464, 45234), (504, 41644), (522, 40208), (609, 34464), (672, 31233), (696, 30156), (718, 29232), (812, 25848), (928, 22617), (1008, 20822), (1044, 20104), (1077, 19488), (1218, 17232), (1392, 15078), (1436, 14616), (1624, 12924), (1827, 11488), (2016, 10411), (2088, 10052), (2154, 9744), (2436, 8616), (2513, 8352), (2784, 7539), (2872, 7308), (3231, 6496), (3248, 6462), (3654, 5744), (4176, 5026), (4308, 4872)]