21299361

素因数分解:

$3^1\times {\mathrm{19}}^2\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:389

約数の個数: 24

約数和(自身を含む): 30504384

約数和(自身を除く): 9205023

約数列:

[1, 3, 19, 57, 71, 213, 277, 361, 831, 1083, 1349, 4047, 5263, 15789, 19667, 25631, 59001, 76893, 99997, 299991, 373673, 1121019, 7099787, 21299361]

約数ペア:

[(1, 21299361), (3, 7099787), (19, 1121019), (57, 373673), (71, 299991), (213, 99997), (277, 76893), (361, 59001), (831, 25631), (1083, 19667), (1349, 15789), (4047, 5263)]