20491380

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1$

素因数の和:180

約数の個数: 240

約数和(自身を含む): 79685760

約数和(自身を除く): 59194380

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 27, 28, 30, 35, 36, 39, 42, 45, 52, 54, 60, 63, 65, 70, 78, 81, 84, 90, 91, 105, 108, 117, 126, 130, 135, 139, 140, 156, 162, 180, 182, 189, 195, 210, 234, 252, 260, 270, 273, 278, 315, 324, 351, 364, 378, 390, 405, 417, 420, 455, 468, 540, 546, 556, 567, 585, 630, 695, 702, 756, 780, 810, 819, 834, 910, 945, 973, 1053, 1092, 1134, 1170, 1251, 1260, 1365, 1390, 1404, 1620, 1638, 1668, 1755, 1807, 1820, 1890, 1946, 2085, 2106, 2268, 2340, 2457, 2502, 2730, 2780, 2835, 2919, 3276, 3510, 3614, 3753, 3780, 3892, 4095, 4170, 4212, 4865, 4914, 5004, 5265, 5421, 5460, 5670, 5838, 6255, 7020, 7228, 7371, 7506, 8190, 8340, 8757, 9035, 9730, 9828, 10530, 10842, 11259, 11340, 11676, 12285, 12510, 12649, 14595, 14742, 15012, 16263, 16380, 17514, 18070, 18765, 19460, 21060, 21684, 22518, 24570, 25020, 25298, 26271, 27105, 29190, 29484, 32526, 35028, 36140, 36855, 37530, 37947, 43785, 45036, 48789, 49140, 50596, 52542, 54210, 56295, 58380, 63245, 65052, 73710, 75060, 75894, 78813, 81315, 87570, 97578, 105084, 108420, 112590, 113841, 126490, 131355, 146367, 147420, 151788, 157626, 162630, 175140, 189735, 195156, 225180, 227682, 243945, 252980, 262710, 292734, 315252, 325260, 341523, 379470, 394065, 455364, 487890, 525420, 569205, 585468, 683046, 731835, 758940, 788130, 975780, 1024569, 1138410, 1366092, 1463670, 1576260, 1707615, 2049138, 2276820, 2927340, 3415230, 4098276, 5122845, 6830460, 10245690, 20491380]

約数ペア:

[(1, 20491380), (2, 10245690), (3, 6830460), (4, 5122845), (5, 4098276), (6, 3415230), (7, 2927340), (9, 2276820), (10, 2049138), (12, 1707615), (13, 1576260), (14, 1463670), (15, 1366092), (18, 1138410), (20, 1024569), (21, 975780), (26, 788130), (27, 758940), (28, 731835), (30, 683046), (35, 585468), (36, 569205), (39, 525420), (42, 487890), (45, 455364), (52, 394065), (54, 379470), (60, 341523), (63, 325260), (65, 315252), (70, 292734), (78, 262710), (81, 252980), (84, 243945), (90, 227682), (91, 225180), (105, 195156), (108, 189735), (117, 175140), (126, 162630), (130, 157626), (135, 151788), (139, 147420), (140, 146367), (156, 131355), (162, 126490), (180, 113841), (182, 112590), (189, 108420), (195, 105084), (210, 97578), (234, 87570), (252, 81315), (260, 78813), (270, 75894), (273, 75060), (278, 73710), (315, 65052), (324, 63245), (351, 58380), (364, 56295), (378, 54210), (390, 52542), (405, 50596), (417, 49140), (420, 48789), (455, 45036), (468, 43785), (540, 37947), (546, 37530), (556, 36855), (567, 36140), (585, 35028), (630, 32526), (695, 29484), (702, 29190), (756, 27105), (780, 26271), (810, 25298), (819, 25020), (834, 24570), (910, 22518), (945, 21684), (973, 21060), (1053, 19460), (1092, 18765), (1134, 18070), (1170, 17514), (1251, 16380), (1260, 16263), (1365, 15012), (1390, 14742), (1404, 14595), (1620, 12649), (1638, 12510), (1668, 12285), (1755, 11676), (1807, 11340), (1820, 11259), (1890, 10842), (1946, 10530), (2085, 9828), (2106, 9730), (2268, 9035), (2340, 8757), (2457, 8340), (2502, 8190), (2730, 7506), (2780, 7371), (2835, 7228), (2919, 7020), (3276, 6255), (3510, 5838), (3614, 5670), (3753, 5460), (3780, 5421), (3892, 5265), (4095, 5004), (4170, 4914), (4212, 4865)]