21146680

素因数分解:

$2^3\times 5^1\times {\mathrm{528667}}^1$

素因数の和:528678

約数の個数: 16

約数和(自身を含む): 47580120

約数和(自身を除く): 26433440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528667, 1057334, 2114668, 2643335, 4229336, 5286670, 10573340, 21146680]

約数ペア:

[(1, 21146680), (2, 10573340), (4, 5286670), (5, 4229336), (8, 2643335), (10, 2114668), (20, 1057334), (40, 528667)]