643469480

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:331

約数の個数: 128

約数和(自身を含む): 1559900160

約数和(自身を除く): 916430680

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 47, 61, 62, 94, 122, 124, 155, 181, 188, 235, 244, 248, 305, 310, 362, 376, 470, 488, 610, 620, 724, 905, 940, 1220, 1240, 1448, 1457, 1810, 1880, 1891, 2440, 2867, 2914, 3620, 3782, 5611, 5734, 5828, 7240, 7285, 7564, 8507, 9455, 11041, 11222, 11468, 11656, 14335, 14570, 15128, 17014, 18910, 22082, 22444, 22936, 28055, 28670, 29140, 34028, 37820, 42535, 44164, 44888, 55205, 56110, 57340, 58280, 68056, 75640, 85070, 88328, 88877, 110410, 112220, 114680, 170140, 177754, 220820, 224440, 263717, 340280, 342271, 355508, 441640, 444385, 518927, 527434, 684542, 711016, 888770, 1037854, 1054868, 1318585, 1369084, 1711355, 1777540, 2075708, 2109736, 2594635, 2637170, 2738168, 3422710, 3555080, 4151416, 5189270, 5274340, 6845420, 10378540, 10548680, 13690840, 16086737, 20757080, 32173474, 64346948, 80433685, 128693896, 160867370, 321734740, 643469480]

約数ペア:

[(1, 643469480), (2, 321734740), (4, 160867370), (5, 128693896), (8, 80433685), (10, 64346948), (20, 32173474), (31, 20757080), (40, 16086737), (47, 13690840), (61, 10548680), (62, 10378540), (94, 6845420), (122, 5274340), (124, 5189270), (155, 4151416), (181, 3555080), (188, 3422710), (235, 2738168), (244, 2637170), (248, 2594635), (305, 2109736), (310, 2075708), (362, 1777540), (376, 1711355), (470, 1369084), (488, 1318585), (610, 1054868), (620, 1037854), (724, 888770), (905, 711016), (940, 684542), (1220, 527434), (1240, 518927), (1448, 444385), (1457, 441640), (1810, 355508), (1880, 342271), (1891, 340280), (2440, 263717), (2867, 224440), (2914, 220820), (3620, 177754), (3782, 170140), (5611, 114680), (5734, 112220), (5828, 110410), (7240, 88877), (7285, 88328), (7564, 85070), (8507, 75640), (9455, 68056), (11041, 58280), (11222, 57340), (11468, 56110), (11656, 55205), (14335, 44888), (14570, 44164), (15128, 42535), (17014, 37820), (18910, 34028), (22082, 29140), (22444, 28670), (22936, 28055)]