20953821

素因数分解:

$3^1\times 7^2\times {\mathrm{142543}}^1$

素因数の和:142560

約数の個数: 12

約数和(自身を含む): 32500032

約数和(自身を除く): 11546211

約数列:

[1, 3, 7, 21, 49, 147, 142543, 427629, 997801, 2993403, 6984607, 20953821]

約数ペア:

[(1, 20953821), (3, 6984607), (7, 2993403), (21, 997801), (49, 427629), (147, 142543)]