21470913

素因数分解:

$3^4\times {\mathrm{139}}^1\times {\mathrm{1907}}^1$

素因数の和:2058

約数の個数: 20

約数和(自身を含む): 32321520

約数和(自身を除く): 10850607

約数列:

[1, 3, 9, 27, 81, 139, 417, 1251, 1907, 3753, 5721, 11259, 17163, 51489, 154467, 265073, 795219, 2385657, 7156971, 21470913]

約数ペア:

[(1, 21470913), (3, 7156971), (9, 2385657), (27, 795219), (81, 265073), (139, 154467), (417, 51489), (1251, 17163), (1907, 11259), (3753, 5721)]