220779640

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{13903}}^1$

素因数の和:14311

約数の個数: 32

約数和(自身を含む): 498041280

約数和(自身を除く): 277261640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 13903, 15880, 27806, 55612, 69515, 111224, 139030, 278060, 556120, 5519491, 11038982, 22077964, 27597455, 44155928, 55194910, 110389820, 220779640]

約数ペア:

[(1, 220779640), (2, 110389820), (4, 55194910), (5, 44155928), (8, 27597455), (10, 22077964), (20, 11038982), (40, 5519491), (397, 556120), (794, 278060), (1588, 139030), (1985, 111224), (3176, 69515), (3970, 55612), (7940, 27806), (13903, 15880)]