20640344

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{2069}}^1$

素因数の和:2147

約数の個数: 32

約数和(自身を含む): 40986000

約数和(自身を除く): 20345656

約数列:

[1, 2, 4, 8, 29, 43, 58, 86, 116, 172, 232, 344, 1247, 2069, 2494, 4138, 4988, 8276, 9976, 16552, 60001, 88967, 120002, 177934, 240004, 355868, 480008, 711736, 2580043, 5160086, 10320172, 20640344]

約数ペア:

[(1, 20640344), (2, 10320172), (4, 5160086), (8, 2580043), (29, 711736), (43, 480008), (58, 355868), (86, 240004), (116, 177934), (172, 120002), (232, 88967), (344, 60001), (1247, 16552), (2069, 9976), (2494, 8276), (4138, 4988)]