280132280

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{17123}}^1$

素因数の和:17543

約数の個数: 32

約数和(自身を含む): 631875600

約数和(自身を除く): 351743320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 4090, 8180, 16360, 17123, 34246, 68492, 85615, 136984, 171230, 342460, 684920, 7003307, 14006614, 28013228, 35016535, 56026456, 70033070, 140066140, 280132280]

約数ペア:

[(1, 280132280), (2, 140066140), (4, 70033070), (5, 56026456), (8, 35016535), (10, 28013228), (20, 14006614), (40, 7003307), (409, 684920), (818, 342460), (1636, 171230), (2045, 136984), (3272, 85615), (4090, 68492), (8180, 34246), (16360, 17123)]