21296920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31319}}^1$

素因数の和:31347

約数の個数: 32

約数和(自身を含む): 50738400

約数和(自身を除く): 29441480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31319, 62638, 125276, 156595, 250552, 313190, 532423, 626380, 1064846, 1252760, 2129692, 2662115, 4259384, 5324230, 10648460, 21296920]

約数ペア:

[(1, 21296920), (2, 10648460), (4, 5324230), (5, 4259384), (8, 2662115), (10, 2129692), (17, 1252760), (20, 1064846), (34, 626380), (40, 532423), (68, 313190), (85, 250552), (136, 156595), (170, 125276), (340, 62638), (680, 31319)]