21757131

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{19979}}^1$

素因数の和:20007

約数の個数: 18

約数和(自身を含む): 34545420

約数和(自身を除く): 12788289

約数列:

[1, 3, 9, 11, 33, 99, 121, 363, 1089, 19979, 59937, 179811, 219769, 659307, 1977921, 2417459, 7252377, 21757131]

約数ペア:

[(1, 21757131), (3, 7252377), (9, 2417459), (11, 1977921), (33, 659307), (99, 219769), (121, 179811), (363, 59937), (1089, 19979)]