21072667

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{2657}}^1$

素因数の和:2778

約数の個数: 16

約数和(自身を含む): 26537472

約数和(自身を除く): 5464805

約数列:

[1, 7, 11, 77, 103, 721, 1133, 2657, 7931, 18599, 29227, 204589, 273671, 1915697, 3010381, 21072667]

約数ペア:

[(1, 21072667), (7, 3010381), (11, 1915697), (77, 273671), (103, 204589), (721, 29227), (1133, 18599), (2657, 7931)]