205217240

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{12923}}^1$

素因数の和:13331

約数の個数: 32

約数和(自身を含む): 462937680

約数和(自身を除く): 257720440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 12923, 15880, 25846, 51692, 64615, 103384, 129230, 258460, 516920, 5130431, 10260862, 20521724, 25652155, 41043448, 51304310, 102608620, 205217240]

約数ペア:

[(1, 205217240), (2, 102608620), (4, 51304310), (5, 41043448), (8, 25652155), (10, 20521724), (20, 10260862), (40, 5130431), (397, 516920), (794, 258460), (1588, 129230), (1985, 103384), (3176, 64615), (3970, 51692), (7940, 25846), (12923, 15880)]