28171221

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{7013}}^1$

素因数の和:7132

約数の個数: 16

約数和(自身を含む): 40849536

約数和(自身を除く): 12678315

約数列:

[1, 3, 13, 39, 103, 309, 1339, 4017, 7013, 21039, 91169, 273507, 722339, 2167017, 9390407, 28171221]

約数ペア:

[(1, 28171221), (3, 9390407), (13, 2167017), (39, 722339), (103, 273507), (309, 91169), (1339, 21039), (4017, 7013)]