12781040

素因数分解:

$2^4\times 5^1\times {\mathrm{159763}}^1$

素因数の和:159776

約数の個数: 20

約数和(自身を含む): 29716104

約数和(自身を除く): 16935064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 159763, 319526, 639052, 798815, 1278104, 1597630, 2556208, 3195260, 6390520, 12781040]

約数ペア:

[(1, 12781040), (2, 6390520), (4, 3195260), (5, 2556208), (8, 1597630), (10, 1278104), (16, 798815), (20, 639052), (40, 319526), (80, 159763)]