28188280

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1723}}^1$

素因数の和:2143

約数の個数: 32

約数和(自身を含む): 63615600

約数和(自身を除く): 35427320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 1723, 2045, 3272, 3446, 4090, 6892, 8180, 8615, 13784, 16360, 17230, 34460, 68920, 704707, 1409414, 2818828, 3523535, 5637656, 7047070, 14094140, 28188280]

約数ペア:

[(1, 28188280), (2, 14094140), (4, 7047070), (5, 5637656), (8, 3523535), (10, 2818828), (20, 1409414), (40, 704707), (409, 68920), (818, 34460), (1636, 17230), (1723, 16360), (2045, 13784), (3272, 8615), (3446, 8180), (4090, 6892)]