20794040

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{811}}^1$

素因数の和:1463

約数の個数: 32

約数和(自身を含む): 46917360

約数和(自身を除く): 26123320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 811, 1282, 1622, 2564, 3205, 3244, 4055, 5128, 6410, 6488, 8110, 12820, 16220, 25640, 32440, 519851, 1039702, 2079404, 2599255, 4158808, 5198510, 10397020, 20794040]

約数ペア:

[(1, 20794040), (2, 10397020), (4, 5198510), (5, 4158808), (8, 2599255), (10, 2079404), (20, 1039702), (40, 519851), (641, 32440), (811, 25640), (1282, 16220), (1622, 12820), (2564, 8110), (3205, 6488), (3244, 6410), (4055, 5128)]