21378903

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{78311}}^1$

素因数の和:78334

約数の個数: 16

約数和(自身を含む): 35083776

約数和(自身を除く): 13704873

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 78311, 234933, 548177, 1018043, 1644531, 3054129, 7126301, 21378903]

約数ペア:

[(1, 21378903), (3, 7126301), (7, 3054129), (13, 1644531), (21, 1018043), (39, 548177), (91, 234933), (273, 78311)]