21972291

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{28949}}^1$

素因数の和:28986

約数の個数: 16

約数和(自身を含む): 33350400

約数和(自身を除く): 11378109

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 28949, 86847, 318439, 665827, 955317, 1997481, 7324097, 21972291]

約数ペア:

[(1, 21972291), (3, 7324097), (11, 1997481), (23, 955317), (33, 665827), (69, 318439), (253, 86847), (759, 28949)]