21904911

素因数分解:

$3^4\times 7^2\times {\mathrm{5519}}^1$

素因数の和:5545

約数の個数: 30

約数和(自身を含む): 38071440

約数和(自身を除く): 16166529

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 5519, 16557, 38633, 49671, 115899, 149013, 270431, 347697, 447039, 811293, 1043091, 2433879, 3129273, 7301637, 21904911]

約数ペア:

[(1, 21904911), (3, 7301637), (7, 3129273), (9, 2433879), (21, 1043091), (27, 811293), (49, 447039), (63, 347697), (81, 270431), (147, 149013), (189, 115899), (441, 49671), (567, 38633), (1323, 16557), (3969, 5519)]