21991212

素因数分解:

$2^2\times 3^2\times {\mathrm{610867}}^1$

素因数の和:610877

約数の個数: 18

約数和(自身を含む): 55588988

約数和(自身を除く): 33597776

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 610867, 1221734, 1832601, 2443468, 3665202, 5497803, 7330404, 10995606, 21991212]

約数ペア:

[(1, 21991212), (2, 10995606), (3, 7330404), (4, 5497803), (6, 3665202), (9, 2443468), (12, 1832601), (18, 1221734), (36, 610867)]