20900040

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:339

約数の個数: 128

約数和(自身を含む): 72576000

約数和(自身を除く): 51675960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 139, 140, 168, 179, 210, 278, 280, 358, 417, 420, 537, 556, 695, 716, 834, 840, 895, 973, 1074, 1112, 1253, 1390, 1432, 1668, 1790, 1946, 2085, 2148, 2506, 2685, 2780, 2919, 3336, 3580, 3759, 3892, 4170, 4296, 4865, 5012, 5370, 5560, 5838, 6265, 7160, 7518, 7784, 8340, 9730, 10024, 10740, 11676, 12530, 14595, 15036, 16680, 18795, 19460, 21480, 23352, 24881, 25060, 29190, 30072, 37590, 38920, 49762, 50120, 58380, 74643, 75180, 99524, 116760, 124405, 149286, 150360, 174167, 199048, 248810, 298572, 348334, 373215, 497620, 522501, 597144, 696668, 746430, 870835, 995240, 1045002, 1393336, 1492860, 1741670, 2090004, 2612505, 2985720, 3483340, 4180008, 5225010, 6966680, 10450020, 20900040]

約数ペア:

[(1, 20900040), (2, 10450020), (3, 6966680), (4, 5225010), (5, 4180008), (6, 3483340), (7, 2985720), (8, 2612505), (10, 2090004), (12, 1741670), (14, 1492860), (15, 1393336), (20, 1045002), (21, 995240), (24, 870835), (28, 746430), (30, 696668), (35, 597144), (40, 522501), (42, 497620), (56, 373215), (60, 348334), (70, 298572), (84, 248810), (105, 199048), (120, 174167), (139, 150360), (140, 149286), (168, 124405), (179, 116760), (210, 99524), (278, 75180), (280, 74643), (358, 58380), (417, 50120), (420, 49762), (537, 38920), (556, 37590), (695, 30072), (716, 29190), (834, 25060), (840, 24881), (895, 23352), (973, 21480), (1074, 19460), (1112, 18795), (1253, 16680), (1390, 15036), (1432, 14595), (1668, 12530), (1790, 11676), (1946, 10740), (2085, 10024), (2148, 9730), (2506, 8340), (2685, 7784), (2780, 7518), (2919, 7160), (3336, 6265), (3580, 5838), (3759, 5560), (3892, 5370), (4170, 5012), (4296, 4865)]