20491263

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{4073}}^1$

素因数の和:4135

約数の個数: 24

約数和(自身を含む): 32624592

約数和(自身を除く): 12133329

約数列:

[1, 3, 9, 13, 39, 43, 117, 129, 387, 559, 1677, 4073, 5031, 12219, 36657, 52949, 158847, 175139, 476541, 525417, 1576251, 2276807, 6830421, 20491263]

約数ペア:

[(1, 20491263), (3, 6830421), (9, 2276807), (13, 1576251), (39, 525417), (43, 476541), (117, 175139), (129, 158847), (387, 52949), (559, 36657), (1677, 12219), (4073, 5031)]