20688213

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{75781}}^1$

素因数の和:75804

約数の個数: 16

約数和(自身を含む): 33950336

約数和(自身を除く): 13262123

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 75781, 227343, 530467, 985153, 1591401, 2955459, 6896071, 20688213]

約数ペア:

[(1, 20688213), (3, 6896071), (7, 2955459), (13, 1591401), (21, 985153), (39, 530467), (91, 227343), (273, 75781)]