21121365

素因数分解:

$3^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{5011}}^1$

素因数の和:5300

約数の個数: 16

約数和(自身を含む): 33921216

約数和(自身を除く): 12799851

約数列:

[1, 3, 5, 15, 281, 843, 1405, 4215, 5011, 15033, 25055, 75165, 1408091, 4224273, 7040455, 21121365]

約数ペア:

[(1, 21121365), (3, 7040455), (5, 4224273), (15, 1408091), (281, 75165), (843, 25055), (1405, 15033), (4215, 5011)]