21390399

素因数分解:

$3^4\times {\mathrm{181}}^1\times {\mathrm{1459}}^1$

素因数の和:1652

約数の個数: 20

約数和(自身を含む): 32152120

約数和(自身を除く): 10761721

約数列:

[1, 3, 9, 27, 81, 181, 543, 1459, 1629, 4377, 4887, 13131, 14661, 39393, 118179, 264079, 792237, 2376711, 7130133, 21390399]

約数ペア:

[(1, 21390399), (3, 7130133), (9, 2376711), (27, 792237), (81, 264079), (181, 118179), (543, 39393), (1459, 14661), (1629, 13131), (4377, 4887)]