81111121

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{571}}^1$

素因数の和:821

約数の個数: 24

約数和(自身を含む): 102246144

約数和(自身を除く): 21135023

約数列:

[1, 7, 13, 49, 91, 223, 571, 637, 1561, 2899, 3997, 7423, 10927, 20293, 27979, 51961, 127333, 142051, 363727, 891331, 1655329, 6239317, 11587303, 81111121]

約数ペア:

[(1, 81111121), (7, 11587303), (13, 6239317), (49, 1655329), (91, 891331), (223, 363727), (571, 142051), (637, 127333), (1561, 51961), (2899, 27979), (3997, 20293), (7423, 10927)]