19845220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11149}}^1$

素因数の和:11247

約数の個数: 24

約数和(自身を含む): 42147000

約数和(自身を除く): 22301780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11149, 22298, 44596, 55745, 111490, 222980, 992261, 1984522, 3969044, 4961305, 9922610, 19845220]

約数ペア:

[(1, 19845220), (2, 9922610), (4, 4961305), (5, 3969044), (10, 1984522), (20, 992261), (89, 222980), (178, 111490), (356, 55745), (445, 44596), (890, 22298), (1780, 11149)]