128921455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{6863}}^1$

素因数の和:6915

約数の個数: 24

約数和(自身を含む): 177008832

約数和(自身を除く): 48087377

約数列:

[1, 5, 13, 17, 65, 85, 221, 289, 1105, 1445, 3757, 6863, 18785, 34315, 89219, 116671, 446095, 583355, 1516723, 1983407, 7583615, 9917035, 25784291, 128921455]

約数ペア:

[(1, 128921455), (5, 25784291), (13, 9917035), (17, 7583615), (65, 1983407), (85, 1516723), (221, 583355), (289, 446095), (1105, 116671), (1445, 89219), (3757, 34315), (6863, 18785)]