21921381

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{293}}^1$

素因数の和:482

約数の個数: 32

約数和(自身を含む): 34715520

約数和(自身を除く): 12794139

約数列:

[1, 3, 9, 17, 27, 51, 153, 163, 293, 459, 489, 879, 1467, 2637, 2771, 4401, 4981, 7911, 8313, 14943, 24939, 44829, 47759, 74817, 134487, 143277, 429831, 811903, 1289493, 2435709, 7307127, 21921381]

約数ペア:

[(1, 21921381), (3, 7307127), (9, 2435709), (17, 1289493), (27, 811903), (51, 429831), (153, 143277), (163, 134487), (293, 74817), (459, 47759), (489, 44829), (879, 24939), (1467, 14943), (2637, 8313), (2771, 7911), (4401, 4981)]