21982040

素因数分解:

$2^3\times 5^1\times {\mathrm{549551}}^1$

素因数の和:549562

約数の個数: 16

約数和(自身を含む): 49459680

約数和(自身を除く): 27477640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 549551, 1099102, 2198204, 2747755, 4396408, 5495510, 10991020, 21982040]

約数ペア:

[(1, 21982040), (2, 10991020), (4, 5495510), (5, 4396408), (8, 2747755), (10, 2198204), (20, 1099102), (40, 549551)]