19747881

素因数分解:

$3^6\times {\mathrm{103}}^1\times {\mathrm{263}}^1$

素因数の和:384

約数の個数: 28

約数和(自身を含む): 30009408

約数和(自身を除く): 10261527

約数列:

[1, 3, 9, 27, 81, 103, 243, 263, 309, 729, 789, 927, 2367, 2781, 7101, 8343, 21303, 25029, 27089, 63909, 75087, 81267, 191727, 243801, 731403, 2194209, 6582627, 19747881]

約数ペア:

[(1, 19747881), (3, 6582627), (9, 2194209), (27, 731403), (81, 243801), (103, 191727), (243, 81267), (263, 75087), (309, 63909), (729, 27089), (789, 25029), (927, 21303), (2367, 8343), (2781, 7101)]