20991567

素因数分解:

$3^1\times {\mathrm{149}}^1\times {\mathrm{151}}^1\times {\mathrm{311}}^1$

素因数の和:614

約数の個数: 16

約数和(自身を含む): 28454400

約数和(自身を除く): 7462833

約数列:

[1, 3, 149, 151, 311, 447, 453, 933, 22499, 46339, 46961, 67497, 139017, 140883, 6997189, 20991567]

約数ペア:

[(1, 20991567), (3, 6997189), (149, 140883), (151, 139017), (311, 67497), (447, 46961), (453, 46339), (933, 22499)]