20983885

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{1307}}^1$

素因数の和:1357

約数の個数: 24

約数和(自身を含む): 28723680

約数和(自身を除く): 7739795

約数列:

[1, 5, 13, 19, 65, 95, 169, 247, 845, 1235, 1307, 3211, 6535, 16055, 16991, 24833, 84955, 124165, 220883, 322829, 1104415, 1614145, 4196777, 20983885]

約数ペア:

[(1, 20983885), (5, 4196777), (13, 1614145), (19, 1104415), (65, 322829), (95, 220883), (169, 124165), (247, 84955), (845, 24833), (1235, 16991), (1307, 16055), (3211, 6535)]