21279903

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{4051}}^1$

素因数の和:4174

約数の個数: 16

約数和(自身を含む): 30341376

約数和(自身を除く): 9061473

約数列:

[1, 3, 17, 51, 103, 309, 1751, 4051, 5253, 12153, 68867, 206601, 417253, 1251759, 7093301, 21279903]

約数ペア:

[(1, 21279903), (3, 7093301), (17, 1251759), (51, 417253), (103, 206601), (309, 68867), (1751, 12153), (4051, 5253)]