21681804

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{42019}}^1$

素因数の和:42069

約数の個数: 24

約数和(自身を含む): 51768640

約数和(自身を除く): 30086836

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 129, 172, 258, 516, 42019, 84038, 126057, 168076, 252114, 504228, 1806817, 3613634, 5420451, 7227268, 10840902, 21681804]

約数ペア:

[(1, 21681804), (2, 10840902), (3, 7227268), (4, 5420451), (6, 3613634), (12, 1806817), (43, 504228), (86, 252114), (129, 168076), (172, 126057), (258, 84038), (516, 42019)]