21090906

素因数分解:

$2^1\times 3^2\times {\mathrm{647}}^1\times {\mathrm{1811}}^1$

素因数の和:2466

約数の個数: 24

約数和(自身を含む): 45792864

約数和(自身を除く): 24701958

約数列:

[1, 2, 3, 6, 9, 18, 647, 1294, 1811, 1941, 3622, 3882, 5433, 5823, 10866, 11646, 16299, 32598, 1171717, 2343434, 3515151, 7030302, 10545453, 21090906]

約数ペア:

[(1, 21090906), (2, 10545453), (3, 7030302), (6, 3515151), (9, 2343434), (18, 1171717), (647, 32598), (1294, 16299), (1811, 11646), (1941, 10866), (3622, 5823), (3882, 5433)]