21906520

素因数分解:

$2^3\times 5^1\times {\mathrm{547663}}^1$

素因数の和:547674

約数の個数: 16

約数和(自身を含む): 49289760

約数和(自身を除く): 27383240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547663, 1095326, 2190652, 2738315, 4381304, 5476630, 10953260, 21906520]

約数ペア:

[(1, 21906520), (2, 10953260), (4, 5476630), (5, 4381304), (8, 2738315), (10, 2190652), (20, 1095326), (40, 547663)]