21791404

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{15091}}^1$

素因数の和:15133

約数の個数: 18

約数和(自身を含む): 40250364

約数和(自身を除く): 18458960

約数列:

[1, 2, 4, 19, 38, 76, 361, 722, 1444, 15091, 30182, 60364, 286729, 573458, 1146916, 5447851, 10895702, 21791404]

約数ペア:

[(1, 21791404), (2, 10895702), (4, 5447851), (19, 1146916), (38, 573458), (76, 286729), (361, 60364), (722, 30182), (1444, 15091)]