21903371

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{4451}}^1$

素因数の和:4514

約数の個数: 16

約数和(自身を含む): 27068160

約数和(自身を除く): 5164789

約数列:

[1, 7, 19, 37, 133, 259, 703, 4451, 4921, 31157, 84569, 164687, 591983, 1152809, 3129053, 21903371]

約数ペア:

[(1, 21903371), (7, 3129053), (19, 1152809), (37, 591983), (133, 164687), (259, 84569), (703, 31157), (4451, 4921)]