21493569

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{181}}^1\times {\mathrm{1721}}^1$

素因数の和:1928

約数の個数: 16

約数和(自身を含む): 30086784

約数和(自身を除く): 8593215

約数列:

[1, 3, 23, 69, 181, 543, 1721, 4163, 5163, 12489, 39583, 118749, 311501, 934503, 7164523, 21493569]

約数ペア:

[(1, 21493569), (3, 7164523), (23, 934503), (69, 311501), (181, 118749), (543, 39583), (1721, 12489), (4163, 5163)]