128880920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{460289}}^1$

素因数の和:460307

約数の個数: 32

約数和(自身を含む): 331408800

約数和(自身を除く): 202527880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 460289, 920578, 1841156, 2301445, 3222023, 3682312, 4602890, 6444046, 9205780, 12888092, 16110115, 18411560, 25776184, 32220230, 64440460, 128880920]

約数ペア:

[(1, 128880920), (2, 64440460), (4, 32220230), (5, 25776184), (7, 18411560), (8, 16110115), (10, 12888092), (14, 9205780), (20, 6444046), (28, 4602890), (35, 3682312), (40, 3222023), (56, 2301445), (70, 1841156), (140, 920578), (280, 460289)]