21387819

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{14461}}^1$

素因数の和:14510

約数の個数: 16

約数和(自身を含む): 31237920

約数和(自身を除く): 9850101

約数列:

[1, 3, 17, 29, 51, 87, 493, 1479, 14461, 43383, 245837, 419369, 737511, 1258107, 7129273, 21387819]

約数ペア:

[(1, 21387819), (3, 7129273), (17, 1258107), (29, 737511), (51, 419369), (87, 245837), (493, 43383), (1479, 14461)]