21517713

素因数分解:

$3^2\times 7^2\times {\mathrm{59}}^1\times {\mathrm{827}}^1$

素因数の和:906

約数の個数: 36

約数和(自身を含む): 36812880

約数和(自身を除く): 15295167

約数列:

[1, 3, 7, 9, 21, 49, 59, 63, 147, 177, 413, 441, 531, 827, 1239, 2481, 2891, 3717, 5789, 7443, 8673, 17367, 26019, 40523, 48793, 52101, 121569, 146379, 341551, 364707, 439137, 1024653, 2390857, 3073959, 7172571, 21517713]

約数ペア:

[(1, 21517713), (3, 7172571), (7, 3073959), (9, 2390857), (21, 1024653), (49, 439137), (59, 364707), (63, 341551), (147, 146379), (177, 121569), (413, 52101), (441, 48793), (531, 40523), (827, 26019), (1239, 17367), (2481, 8673), (2891, 7443), (3717, 5789)]