20992923

素因数分解:

$3^2\times 7^2\times {\mathrm{181}}^1\times {\mathrm{263}}^1$

素因数の和:464

約数の個数: 36

約数和(自身を含む): 35603568

約数和(自身を除く): 14610645

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 181, 263, 441, 543, 789, 1267, 1629, 1841, 2367, 3801, 5523, 8869, 11403, 12887, 16569, 26607, 38661, 47603, 79821, 115983, 142809, 333221, 428427, 999663, 2332547, 2998989, 6997641, 20992923]

約数ペア:

[(1, 20992923), (3, 6997641), (7, 2998989), (9, 2332547), (21, 999663), (49, 428427), (63, 333221), (147, 142809), (181, 115983), (263, 79821), (441, 47603), (543, 38661), (789, 26607), (1267, 16569), (1629, 12887), (1841, 11403), (2367, 8869), (3801, 5523)]