19861600

素因数分解:

$2^5\times 5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:129

約数の個数: 144

約数和(自身を含む): 55215216

約数和(自身を除く): 35353616

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 37, 40, 44, 50, 55, 61, 74, 80, 88, 100, 110, 122, 148, 160, 176, 185, 200, 220, 244, 275, 296, 305, 352, 370, 400, 407, 440, 488, 550, 592, 610, 671, 740, 800, 814, 880, 925, 976, 1100, 1184, 1220, 1342, 1480, 1525, 1628, 1760, 1850, 1952, 2035, 2200, 2257, 2440, 2684, 2960, 3050, 3256, 3355, 3700, 4070, 4400, 4514, 4880, 5368, 5920, 6100, 6512, 6710, 7400, 8140, 8800, 9028, 9760, 10175, 10736, 11285, 12200, 13024, 13420, 14800, 16280, 16775, 18056, 20350, 21472, 22570, 24400, 24827, 26840, 29600, 32560, 33550, 36112, 40700, 45140, 48800, 49654, 53680, 56425, 65120, 67100, 72224, 81400, 90280, 99308, 107360, 112850, 124135, 134200, 162800, 180560, 198616, 225700, 248270, 268400, 325600, 361120, 397232, 451400, 496540, 536800, 620675, 794464, 902800, 993080, 1241350, 1805600, 1986160, 2482700, 3972320, 4965400, 9930800, 19861600]

約数ペア:

[(1, 19861600), (2, 9930800), (4, 4965400), (5, 3972320), (8, 2482700), (10, 1986160), (11, 1805600), (16, 1241350), (20, 993080), (22, 902800), (25, 794464), (32, 620675), (37, 536800), (40, 496540), (44, 451400), (50, 397232), (55, 361120), (61, 325600), (74, 268400), (80, 248270), (88, 225700), (100, 198616), (110, 180560), (122, 162800), (148, 134200), (160, 124135), (176, 112850), (185, 107360), (200, 99308), (220, 90280), (244, 81400), (275, 72224), (296, 67100), (305, 65120), (352, 56425), (370, 53680), (400, 49654), (407, 48800), (440, 45140), (488, 40700), (550, 36112), (592, 33550), (610, 32560), (671, 29600), (740, 26840), (800, 24827), (814, 24400), (880, 22570), (925, 21472), (976, 20350), (1100, 18056), (1184, 16775), (1220, 16280), (1342, 14800), (1480, 13420), (1525, 13024), (1628, 12200), (1760, 11285), (1850, 10736), (1952, 10175), (2035, 9760), (2200, 9028), (2257, 8800), (2440, 8140), (2684, 7400), (2960, 6710), (3050, 6512), (3256, 6100), (3355, 5920), (3700, 5368), (4070, 4880), (4400, 4514)]