21127923

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{8123}}^1$

素因数の和:8163

約数の個数: 18

約数和(自身を含む): 32422884

約数和(自身を除く): 11294961

約数列:

[1, 3, 9, 17, 51, 153, 289, 867, 2601, 8123, 24369, 73107, 138091, 414273, 1242819, 2347547, 7042641, 21127923]

約数ペア:

[(1, 21127923), (3, 7042641), (9, 2347547), (17, 1242819), (51, 414273), (153, 138091), (289, 73107), (867, 24369), (2601, 8123)]