21682705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20749}}^1$

素因数の和:20784

約数の個数: 16

約数和(自身を含む): 29880000

約数和(自身を除く): 8197295

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20749, 103745, 228239, 394231, 1141195, 1971155, 4336541, 21682705]

約数ペア:

[(1, 21682705), (5, 4336541), (11, 1971155), (19, 1141195), (55, 394231), (95, 228239), (209, 103745), (1045, 20749)]