21251037

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{127}}^1\times {\mathrm{193}}^1$

素因数の和:357

約数の個数: 24

約数和(自身を含む): 30493696

約数和(自身を除く): 9242659

約数列:

[1, 3, 17, 51, 127, 193, 289, 381, 579, 867, 2159, 3281, 6477, 9843, 24511, 36703, 55777, 73533, 110109, 167331, 416687, 1250061, 7083679, 21251037]

約数ペア:

[(1, 21251037), (3, 7083679), (17, 1250061), (51, 416687), (127, 167331), (193, 110109), (289, 73533), (381, 55777), (579, 36703), (867, 24511), (2159, 9843), (3281, 6477)]