8640040

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{3541}}^1$

素因数の和:3613

約数の個数: 32

約数和(自身を含む): 19764360

約数和(自身を除く): 11124320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 3541, 7082, 14164, 17705, 28328, 35410, 70820, 141640, 216001, 432002, 864004, 1080005, 1728008, 2160010, 4320020, 8640040]

約数ペア:

[(1, 8640040), (2, 4320020), (4, 2160010), (5, 1728008), (8, 1080005), (10, 864004), (20, 432002), (40, 216001), (61, 141640), (122, 70820), (244, 35410), (305, 28328), (488, 17705), (610, 14164), (1220, 7082), (2440, 3541)]