18985707

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{617}}^1$

素因数の和:899

約数の個数: 24

約数和(自身を含む): 29693664

約数和(自身を除く): 10707957

約数列:

[1, 3, 9, 13, 39, 117, 263, 617, 789, 1851, 2367, 3419, 5553, 8021, 10257, 24063, 30771, 72189, 162271, 486813, 1460439, 2109523, 6328569, 18985707]

約数ペア:

[(1, 18985707), (3, 6328569), (9, 2109523), (13, 1460439), (39, 486813), (117, 162271), (263, 72189), (617, 30771), (789, 24063), (1851, 10257), (2367, 8021), (3419, 5553)]