20853567

素因数分解:

$3^2\times 7^2\times {\mathrm{47287}}^1$

素因数の和:47307

約数の個数: 18

約数和(自身を含む): 35040408

約数和(自身を除く): 14186841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47287, 141861, 331009, 425583, 993027, 2317063, 2979081, 6951189, 20853567]

約数ペア:

[(1, 20853567), (3, 6951189), (7, 2979081), (9, 2317063), (21, 993027), (49, 425583), (63, 331009), (147, 141861), (441, 47287)]