19431280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:406

約数の個数: 80

約数和(自身を含む): 50139648

約数和(自身を除く): 30708368

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 71, 80, 88, 110, 142, 176, 220, 284, 311, 355, 440, 568, 622, 710, 781, 880, 1136, 1244, 1420, 1555, 1562, 2488, 2840, 3110, 3124, 3421, 3905, 4976, 5680, 6220, 6248, 6842, 7810, 12440, 12496, 13684, 15620, 17105, 22081, 24880, 27368, 31240, 34210, 44162, 54736, 62480, 68420, 88324, 110405, 136840, 176648, 220810, 242891, 273680, 353296, 441620, 485782, 883240, 971564, 1214455, 1766480, 1943128, 2428910, 3886256, 4857820, 9715640, 19431280]

約数ペア:

[(1, 19431280), (2, 9715640), (4, 4857820), (5, 3886256), (8, 2428910), (10, 1943128), (11, 1766480), (16, 1214455), (20, 971564), (22, 883240), (40, 485782), (44, 441620), (55, 353296), (71, 273680), (80, 242891), (88, 220810), (110, 176648), (142, 136840), (176, 110405), (220, 88324), (284, 68420), (311, 62480), (355, 54736), (440, 44162), (568, 34210), (622, 31240), (710, 27368), (781, 24880), (880, 22081), (1136, 17105), (1244, 15620), (1420, 13684), (1555, 12496), (1562, 12440), (2488, 7810), (2840, 6842), (3110, 6248), (3124, 6220), (3421, 5680), (3905, 4976)]