20391408

素因数分解:

$2^4\times 3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:319

約数の個数: 120

約数和(自身を含む): 62384400

約数和(自身を除く): 41992992

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 19, 24, 29, 36, 38, 48, 57, 58, 72, 76, 87, 114, 116, 144, 152, 171, 174, 228, 232, 257, 261, 304, 342, 348, 456, 464, 514, 522, 551, 684, 696, 771, 912, 1028, 1044, 1102, 1368, 1392, 1542, 1653, 2056, 2088, 2204, 2313, 2736, 3084, 3306, 4112, 4176, 4408, 4626, 4883, 4959, 6168, 6612, 7453, 8816, 9252, 9766, 9918, 12336, 13224, 14649, 14906, 18504, 19532, 19836, 22359, 26448, 29298, 29812, 37008, 39064, 39672, 43947, 44718, 58596, 59624, 67077, 78128, 79344, 87894, 89436, 117192, 119248, 134154, 141607, 175788, 178872, 234384, 268308, 283214, 351576, 357744, 424821, 536616, 566428, 703152, 849642, 1073232, 1132856, 1274463, 1699284, 2265712, 2548926, 3398568, 5097852, 6797136, 10195704, 20391408]

約数ペア:

[(1, 20391408), (2, 10195704), (3, 6797136), (4, 5097852), (6, 3398568), (8, 2548926), (9, 2265712), (12, 1699284), (16, 1274463), (18, 1132856), (19, 1073232), (24, 849642), (29, 703152), (36, 566428), (38, 536616), (48, 424821), (57, 357744), (58, 351576), (72, 283214), (76, 268308), (87, 234384), (114, 178872), (116, 175788), (144, 141607), (152, 134154), (171, 119248), (174, 117192), (228, 89436), (232, 87894), (257, 79344), (261, 78128), (304, 67077), (342, 59624), (348, 58596), (456, 44718), (464, 43947), (514, 39672), (522, 39064), (551, 37008), (684, 29812), (696, 29298), (771, 26448), (912, 22359), (1028, 19836), (1044, 19532), (1102, 18504), (1368, 14906), (1392, 14649), (1542, 13224), (1653, 12336), (2056, 9918), (2088, 9766), (2204, 9252), (2313, 8816), (2736, 7453), (3084, 6612), (3306, 6168), (4112, 4959), (4176, 4883), (4408, 4626)]