21556353

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{281}}^2$

素因数の和:585

約数の個数: 24

約数和(自身を含む): 35500864

約数和(自身を除く): 13944511

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 281, 843, 1967, 3653, 5901, 10959, 25571, 76713, 78961, 236883, 552727, 1026493, 1658181, 3079479, 7185451, 21556353]

約数ペア:

[(1, 21556353), (3, 7185451), (7, 3079479), (13, 1658181), (21, 1026493), (39, 552727), (91, 236883), (273, 78961), (281, 76713), (843, 25571), (1967, 10959), (3653, 5901)]