17880920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{10903}}^1$

素因数の和:10955

約数の個数: 32

約数和(自身を含む): 41217120

約数和(自身を除く): 23336200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 10903, 21806, 43612, 54515, 87224, 109030, 218060, 436120, 447023, 894046, 1788092, 2235115, 3576184, 4470230, 8940460, 17880920]

約数ペア:

[(1, 17880920), (2, 8940460), (4, 4470230), (5, 3576184), (8, 2235115), (10, 1788092), (20, 894046), (40, 447023), (41, 436120), (82, 218060), (164, 109030), (205, 87224), (328, 54515), (410, 43612), (820, 21806), (1640, 10903)]