21246440

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{1697}}^1$

素因数の和:2021

約数の個数: 32

約数和(自身を含む): 47985480

約数和(自身を除く): 26739040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 1697, 2504, 3130, 3394, 6260, 6788, 8485, 12520, 13576, 16970, 33940, 67880, 531161, 1062322, 2124644, 2655805, 4249288, 5311610, 10623220, 21246440]

約数ペア:

[(1, 21246440), (2, 10623220), (4, 5311610), (5, 4249288), (8, 2655805), (10, 2124644), (20, 1062322), (40, 531161), (313, 67880), (626, 33940), (1252, 16970), (1565, 13576), (1697, 12520), (2504, 8485), (3130, 6788), (3394, 6260)]