21236080

素因数分解:

$2^4\times 5^1\times {\mathrm{265451}}^1$

素因数の和:265464

約数の個数: 20

約数和(自身を含む): 49374072

約数和(自身を除く): 28137992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265451, 530902, 1061804, 1327255, 2123608, 2654510, 4247216, 5309020, 10618040, 21236080]

約数ペア:

[(1, 21236080), (2, 10618040), (4, 5309020), (5, 4247216), (8, 2654510), (10, 2123608), (16, 1327255), (20, 1061804), (40, 530902), (80, 265451)]