20820317

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1\times {\mathrm{431}}^1$

素因数の和:608

約数の個数: 16

約数和(自身を含む): 24440832

約数和(自身を除く): 3620515

約数列:

[1, 7, 67, 103, 431, 469, 721, 3017, 6901, 28877, 44393, 48307, 202139, 310751, 2974331, 20820317]

約数ペア:

[(1, 20820317), (7, 2974331), (67, 310751), (103, 202139), (431, 48307), (469, 44393), (721, 28877), (3017, 6901)]