20388921

素因数分解:

$3^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{10909}}^1$

素因数の和:11008

約数の個数: 16

約数和(自身を含む): 31420800

約数和(自身を除く): 11031879

約数列:

[1, 3, 7, 21, 89, 267, 623, 1869, 10909, 32727, 76363, 229089, 970901, 2912703, 6796307, 20388921]

約数ペア:

[(1, 20388921), (3, 6796307), (7, 2912703), (21, 970901), (89, 229089), (267, 76363), (623, 32727), (1869, 10909)]