2640920

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{641}}^1$

素因数の和:755

約数の個数: 32

約数和(自身を含む): 6009120

約数和(自身を除く): 3368200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 641, 824, 1030, 1282, 2060, 2564, 3205, 4120, 5128, 6410, 12820, 25640, 66023, 132046, 264092, 330115, 528184, 660230, 1320460, 2640920]

約数ペア:

[(1, 2640920), (2, 1320460), (4, 660230), (5, 528184), (8, 330115), (10, 264092), (20, 132046), (40, 66023), (103, 25640), (206, 12820), (412, 6410), (515, 5128), (641, 4120), (824, 3205), (1030, 2564), (1282, 2060)]