20689760

素因数分解:

$2^5\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1$

素因数の和:78

約数の個数: 192

約数和(自身を含む): 63504000

約数和(自身を除く): 42814240

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 29, 32, 35, 40, 49, 52, 56, 58, 65, 70, 80, 91, 98, 104, 112, 116, 130, 140, 145, 160, 182, 196, 203, 208, 224, 232, 245, 260, 280, 290, 343, 364, 377, 392, 406, 416, 455, 464, 490, 520, 560, 580, 637, 686, 728, 754, 784, 812, 910, 928, 980, 1015, 1040, 1120, 1160, 1274, 1372, 1421, 1456, 1508, 1568, 1624, 1715, 1820, 1885, 1960, 2030, 2080, 2320, 2548, 2639, 2744, 2842, 2912, 3016, 3185, 3248, 3430, 3640, 3770, 3920, 4060, 4459, 4640, 5096, 5278, 5488, 5684, 6032, 6370, 6496, 6860, 7105, 7280, 7540, 7840, 8120, 8918, 9947, 10192, 10556, 10976, 11368, 12064, 12740, 13195, 13720, 14210, 14560, 15080, 16240, 17836, 18473, 19894, 20384, 21112, 22295, 22736, 25480, 26390, 27440, 28420, 30160, 32480, 35672, 36946, 39788, 42224, 44590, 45472, 49735, 50960, 52780, 54880, 56840, 60320, 71344, 73892, 79576, 84448, 89180, 92365, 99470, 101920, 105560, 113680, 129311, 142688, 147784, 159152, 178360, 184730, 198940, 211120, 227360, 258622, 295568, 318304, 356720, 369460, 397880, 422240, 517244, 591136, 646555, 713440, 738920, 795760, 1034488, 1293110, 1477840, 1591520, 2068976, 2586220, 2955680, 4137952, 5172440, 10344880, 20689760]

約数ペア:

[(1, 20689760), (2, 10344880), (4, 5172440), (5, 4137952), (7, 2955680), (8, 2586220), (10, 2068976), (13, 1591520), (14, 1477840), (16, 1293110), (20, 1034488), (26, 795760), (28, 738920), (29, 713440), (32, 646555), (35, 591136), (40, 517244), (49, 422240), (52, 397880), (56, 369460), (58, 356720), (65, 318304), (70, 295568), (80, 258622), (91, 227360), (98, 211120), (104, 198940), (112, 184730), (116, 178360), (130, 159152), (140, 147784), (145, 142688), (160, 129311), (182, 113680), (196, 105560), (203, 101920), (208, 99470), (224, 92365), (232, 89180), (245, 84448), (260, 79576), (280, 73892), (290, 71344), (343, 60320), (364, 56840), (377, 54880), (392, 52780), (406, 50960), (416, 49735), (455, 45472), (464, 44590), (490, 42224), (520, 39788), (560, 36946), (580, 35672), (637, 32480), (686, 30160), (728, 28420), (754, 27440), (784, 26390), (812, 25480), (910, 22736), (928, 22295), (980, 21112), (1015, 20384), (1040, 19894), (1120, 18473), (1160, 17836), (1274, 16240), (1372, 15080), (1421, 14560), (1456, 14210), (1508, 13720), (1568, 13195), (1624, 12740), (1715, 12064), (1820, 11368), (1885, 10976), (1960, 10556), (2030, 10192), (2080, 9947), (2320, 8918), (2548, 8120), (2639, 7840), (2744, 7540), (2842, 7280), (2912, 7105), (3016, 6860), (3185, 6496), (3248, 6370), (3430, 6032), (3640, 5684), (3770, 5488), (3920, 5278), (4060, 5096), (4459, 4640)]