21164680

素因数分解:

$2^3\times 5^1\times {\mathrm{529117}}^1$

素因数の和:529128

約数の個数: 16

約数和(自身を含む): 47620620

約数和(自身を除く): 26455940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 529117, 1058234, 2116468, 2645585, 4232936, 5291170, 10582340, 21164680]

約数ペア:

[(1, 21164680), (2, 10582340), (4, 5291170), (5, 4232936), (8, 2645585), (10, 2116468), (20, 1058234), (40, 529117)]