208075640

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{13103}}^1$

素因数の和:13511

約数の個数: 32

約数和(自身を含む): 469385280

約数和(自身を除く): 261309640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 13103, 15880, 26206, 52412, 65515, 104824, 131030, 262060, 524120, 5201891, 10403782, 20807564, 26009455, 41615128, 52018910, 104037820, 208075640]

約数ペア:

[(1, 208075640), (2, 104037820), (4, 52018910), (5, 41615128), (8, 26009455), (10, 20807564), (20, 10403782), (40, 5201891), (397, 524120), (794, 262060), (1588, 131030), (1985, 104824), (3176, 65515), (3970, 52412), (7940, 26206), (13103, 15880)]