20545721

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{197}}^1\times {\mathrm{317}}^1$

素因数の和:568

約数の個数: 16

約数和(自身を含む): 24178176

約数和(自身を除く): 3632455

約数列:

[1, 7, 47, 197, 317, 329, 1379, 2219, 9259, 14899, 62449, 64813, 104293, 437143, 2935103, 20545721]

約数ペア:

[(1, 20545721), (7, 2935103), (47, 437143), (197, 104293), (317, 64813), (329, 62449), (1379, 14899), (2219, 9259)]