18720136

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{54419}}^1$

素因数の和:54468

約数の個数: 16

約数和(自身を含む): 35917200

約数和(自身を除く): 17197064

約数列:

[1, 2, 4, 8, 43, 86, 172, 344, 54419, 108838, 217676, 435352, 2340017, 4680034, 9360068, 18720136]

約数ペア:

[(1, 18720136), (2, 9360068), (4, 4680034), (8, 2340017), (43, 435352), (86, 217676), (172, 108838), (344, 54419)]