21118540

素因数分解:

$2^2\times 5^1\times {\mathrm{317}}^1\times {\mathrm{3331}}^1$

素因数の和:3657

約数の個数: 24

約数和(自身を含む): 44502192

約数和(自身を除く): 23383652

約数列:

[1, 2, 4, 5, 10, 20, 317, 634, 1268, 1585, 3170, 3331, 6340, 6662, 13324, 16655, 33310, 66620, 1055927, 2111854, 4223708, 5279635, 10559270, 21118540]

約数ペア:

[(1, 21118540), (2, 10559270), (4, 5279635), (5, 4223708), (10, 2111854), (20, 1055927), (317, 66620), (634, 33310), (1268, 16655), (1585, 13324), (3170, 6662), (3331, 6340)]