21497787

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{2657}}^1$

素因数の和:2723

約数の個数: 24

約数和(自身を含む): 33171840

約数和(自身を除く): 11674053

約数列:

[1, 3, 9, 29, 31, 87, 93, 261, 279, 899, 2657, 2697, 7971, 8091, 23913, 77053, 82367, 231159, 247101, 693477, 741303, 2388643, 7165929, 21497787]

約数ペア:

[(1, 21497787), (3, 7165929), (9, 2388643), (29, 741303), (31, 693477), (87, 247101), (93, 231159), (261, 82367), (279, 77053), (899, 23913), (2657, 8091), (2697, 7971)]