18918921

素因数分解:

$3^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{5527}}^1$

素因数の和:5700

約数の個数: 16

約数和(自身を含む): 29010944

約数和(自身を除く): 10092023

約数列:

[1, 3, 7, 21, 163, 489, 1141, 3423, 5527, 16581, 38689, 116067, 900901, 2702703, 6306307, 18918921]

約数ペア:

[(1, 18918921), (3, 6306307), (7, 2702703), (21, 900901), (163, 116067), (489, 38689), (1141, 16581), (3423, 5527)]