21463880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12479}}^1$

素因数の和:12533

約数の個数: 32

約数和(自身を含む): 49420800

約数和(自身を除く): 27956920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12479, 24958, 49916, 62395, 99832, 124790, 249580, 499160, 536597, 1073194, 2146388, 2682985, 4292776, 5365970, 10731940, 21463880]

約数ペア:

[(1, 21463880), (2, 10731940), (4, 5365970), (5, 4292776), (8, 2682985), (10, 2146388), (20, 1073194), (40, 536597), (43, 499160), (86, 249580), (172, 124790), (215, 99832), (344, 62395), (430, 49916), (860, 24958), (1720, 12479)]