21287480

素因数分解:

$2^3\times 5^1\times {\mathrm{532187}}^1$

素因数の和:532198

約数の個数: 16

約数和(自身を含む): 47896920

約数和(自身を除く): 26609440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 532187, 1064374, 2128748, 2660935, 4257496, 5321870, 10643740, 21287480]

約数ペア:

[(1, 21287480), (2, 10643740), (4, 5321870), (5, 4257496), (8, 2660935), (10, 2128748), (20, 1064374), (40, 532187)]