81683920

素因数分解:

$2^4\times 5^1\times {\mathrm{811}}^1\times {\mathrm{1259}}^1$

素因数の和:2083

約数の個数: 40

約数和(自身を含む): 190300320

約数和(自身を除く): 108616400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 811, 1259, 1622, 2518, 3244, 4055, 5036, 6295, 6488, 8110, 10072, 12590, 12976, 16220, 20144, 25180, 32440, 50360, 64880, 100720, 1021049, 2042098, 4084196, 5105245, 8168392, 10210490, 16336784, 20420980, 40841960, 81683920]

約数ペア:

[(1, 81683920), (2, 40841960), (4, 20420980), (5, 16336784), (8, 10210490), (10, 8168392), (16, 5105245), (20, 4084196), (40, 2042098), (80, 1021049), (811, 100720), (1259, 64880), (1622, 50360), (2518, 32440), (3244, 25180), (4055, 20144), (5036, 16220), (6295, 12976), (6488, 12590), (8110, 10072)]