21447999

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{1361}}^1$

素因数の和:1487

約数の個数: 24

約数和(自身を含む): 33145632

約数和(自身を除く): 11697633

約数列:

[1, 3, 9, 17, 51, 103, 153, 309, 927, 1361, 1751, 4083, 5253, 12249, 15759, 23137, 69411, 140183, 208233, 420549, 1261647, 2383111, 7149333, 21447999]

約数ペア:

[(1, 21447999), (3, 7149333), (9, 2383111), (17, 1261647), (51, 420549), (103, 208233), (153, 140183), (309, 69411), (927, 23137), (1361, 15759), (1751, 12249), (4083, 5253)]