21688989

素因数分解:

$3^1\times 7^1\times {\mathrm{839}}^1\times {\mathrm{1231}}^1$

素因数の和:2080

約数の個数: 16

約数和(自身を含む): 33116160

約数和(自身を除く): 11427171

約数列:

[1, 3, 7, 21, 839, 1231, 2517, 3693, 5873, 8617, 17619, 25851, 1032809, 3098427, 7229663, 21688989]

約数ペア:

[(1, 21688989), (3, 7229663), (7, 3098427), (21, 1032809), (839, 25851), (1231, 17619), (2517, 8617), (3693, 5873)]