19957240

素因数分解:

$2^3\times 5^1\times {\mathrm{498931}}^1$

素因数の和:498942

約数の個数: 16

約数和(自身を含む): 44903880

約数和(自身を除く): 24946640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 498931, 997862, 1995724, 2494655, 3991448, 4989310, 9978620, 19957240]

約数ペア:

[(1, 19957240), (2, 9978620), (4, 4989310), (5, 3991448), (8, 2494655), (10, 1995724), (20, 997862), (40, 498931)]