21981951

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{1031}}^1$

素因数の和:1163

約数の個数: 24

約数和(自身を含む): 33486336

約数和(自身を除く): 11504385

約数列:

[1, 3, 9, 23, 69, 103, 207, 309, 927, 1031, 2369, 3093, 7107, 9279, 21321, 23713, 71139, 106193, 213417, 318579, 955737, 2442439, 7327317, 21981951]

約数ペア:

[(1, 21981951), (3, 7327317), (9, 2442439), (23, 955737), (69, 318579), (103, 213417), (207, 106193), (309, 71139), (927, 23713), (1031, 21321), (2369, 9279), (3093, 7107)]