21453903

素因数分解:

$3^4\times {\mathrm{173}}^1\times {\mathrm{1531}}^1$

素因数の和:1716

約数の個数: 20

約数和(自身を含む): 32254728

約数和(自身を除く): 10800825

約数列:

[1, 3, 9, 27, 81, 173, 519, 1531, 1557, 4593, 4671, 13779, 14013, 41337, 124011, 264863, 794589, 2383767, 7151301, 21453903]

約数ペア:

[(1, 21453903), (3, 7151301), (9, 2383767), (27, 794589), (81, 264863), (173, 124011), (519, 41337), (1531, 14013), (1557, 13779), (4593, 4671)]