21240879

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{1783}}^1$

素因数の和:1835

約数の個数: 24

約数和(自身を含む): 32625792

約数和(自身を除く): 11384913

約数列:

[1, 3, 11, 19, 33, 57, 209, 361, 627, 1083, 1783, 3971, 5349, 11913, 19613, 33877, 58839, 101631, 372647, 643663, 1117941, 1930989, 7080293, 21240879]

約数ペア:

[(1, 21240879), (3, 7080293), (11, 1930989), (19, 1117941), (33, 643663), (57, 372647), (209, 101631), (361, 58839), (627, 33877), (1083, 19613), (1783, 11913), (3971, 5349)]