19845040

素因数分解:

$2^4\times 5^1\times {\mathrm{248063}}^1$

素因数の和:248076

約数の個数: 20

約数和(自身を含む): 46139904

約数和(自身を除く): 26294864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248063, 496126, 992252, 1240315, 1984504, 2480630, 3969008, 4961260, 9922520, 19845040]

約数ペア:

[(1, 19845040), (2, 9922520), (4, 4961260), (5, 3969008), (8, 2480630), (10, 1984504), (16, 1240315), (20, 992252), (40, 496126), (80, 248063)]