21118435

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{569}}^1\times {\mathrm{571}}^1$

素因数の和:1158

約数の個数: 16

約数和(自身を含む): 27387360

約数和(自身を除く): 6268925

約数列:

[1, 5, 13, 65, 569, 571, 2845, 2855, 7397, 7423, 36985, 37115, 324899, 1624495, 4223687, 21118435]

約数ペア:

[(1, 21118435), (5, 4223687), (13, 1624495), (65, 324899), (569, 37115), (571, 36985), (2845, 7423), (2855, 7397)]