21721560

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1361}}^1$

素因数の和:1401

約数の個数: 128

約数和(自身を含む): 78451200

約数和(自身を除く): 56729640

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 19, 20, 21, 24, 28, 30, 35, 38, 40, 42, 56, 57, 60, 70, 76, 84, 95, 105, 114, 120, 133, 140, 152, 168, 190, 210, 228, 266, 280, 285, 380, 399, 420, 456, 532, 570, 665, 760, 798, 840, 1064, 1140, 1330, 1361, 1596, 1995, 2280, 2660, 2722, 3192, 3990, 4083, 5320, 5444, 6805, 7980, 8166, 9527, 10888, 13610, 15960, 16332, 19054, 20415, 25859, 27220, 28581, 32664, 38108, 40830, 47635, 51718, 54440, 57162, 76216, 77577, 81660, 95270, 103436, 114324, 129295, 142905, 155154, 163320, 181013, 190540, 206872, 228648, 258590, 285810, 310308, 362026, 381080, 387885, 517180, 543039, 571620, 620616, 724052, 775770, 905065, 1034360, 1086078, 1143240, 1448104, 1551540, 1810130, 2172156, 2715195, 3103080, 3620260, 4344312, 5430390, 7240520, 10860780, 21721560]

約数ペア:

[(1, 21721560), (2, 10860780), (3, 7240520), (4, 5430390), (5, 4344312), (6, 3620260), (7, 3103080), (8, 2715195), (10, 2172156), (12, 1810130), (14, 1551540), (15, 1448104), (19, 1143240), (20, 1086078), (21, 1034360), (24, 905065), (28, 775770), (30, 724052), (35, 620616), (38, 571620), (40, 543039), (42, 517180), (56, 387885), (57, 381080), (60, 362026), (70, 310308), (76, 285810), (84, 258590), (95, 228648), (105, 206872), (114, 190540), (120, 181013), (133, 163320), (140, 155154), (152, 142905), (168, 129295), (190, 114324), (210, 103436), (228, 95270), (266, 81660), (280, 77577), (285, 76216), (380, 57162), (399, 54440), (420, 51718), (456, 47635), (532, 40830), (570, 38108), (665, 32664), (760, 28581), (798, 27220), (840, 25859), (1064, 20415), (1140, 19054), (1330, 16332), (1361, 15960), (1596, 13610), (1995, 10888), (2280, 9527), (2660, 8166), (2722, 7980), (3192, 6805), (3990, 5444), (4083, 5320)]