21898269

素因数分解:

$3^4\times {\mathrm{409}}^1\times {\mathrm{661}}^1$

素因数の和:1082

約数の個数: 20

約数和(自身を含む): 32841820

約数和(自身を除く): 10943551

約数列:

[1, 3, 9, 27, 81, 409, 661, 1227, 1983, 3681, 5949, 11043, 17847, 33129, 53541, 270349, 811047, 2433141, 7299423, 21898269]

約数ペア:

[(1, 21898269), (3, 7299423), (9, 2433141), (27, 811047), (81, 270349), (409, 53541), (661, 33129), (1227, 17847), (1983, 11043), (3681, 5949)]