18957969

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{5443}}^1$

素因数の和:5498

約数の個数: 20

約数和(自身を含む): 28983856

約数和(自身を除く): 10025887

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 5443, 16329, 48987, 146961, 234049, 440883, 702147, 2106441, 6319323, 18957969]

約数ペア:

[(1, 18957969), (3, 6319323), (9, 2106441), (27, 702147), (43, 440883), (81, 234049), (129, 146961), (387, 48987), (1161, 16329), (3483, 5443)]