20720049

素因数分解:

$3^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{9769}}^1$

素因数の和:9880

約数の個数: 16

約数和(自身を含む): 31889280

約数和(自身を除く): 11169231

約数列:

[1, 3, 7, 21, 101, 303, 707, 2121, 9769, 29307, 68383, 205149, 986669, 2960007, 6906683, 20720049]

約数ペア:

[(1, 20720049), (3, 6906683), (7, 2960007), (21, 986669), (101, 205149), (303, 68383), (707, 29307), (2121, 9769)]