978820

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{449}}^1$

素因数の和:567

約数の個数: 24

約数和(自身を含む): 2079000

約数和(自身を除く): 1100180

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 449, 545, 898, 1090, 1796, 2180, 2245, 4490, 8980, 48941, 97882, 195764, 244705, 489410, 978820]

約数ペア:

[(1, 978820), (2, 489410), (4, 244705), (5, 195764), (10, 97882), (20, 48941), (109, 8980), (218, 4490), (436, 2245), (449, 2180), (545, 1796), (898, 1090)]