18972561

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{79}}^1\times {\mathrm{277}}^1$

素因数の和:393

約数の個数: 24

約数和(自身を含む): 27310720

約数和(自身を除く): 8338159

約数列:

[1, 3, 17, 51, 79, 237, 277, 289, 831, 867, 1343, 4029, 4709, 14127, 21883, 22831, 65649, 68493, 80053, 240159, 372011, 1116033, 6324187, 18972561]

約数ペア:

[(1, 18972561), (3, 6324187), (17, 1116033), (51, 372011), (79, 240159), (237, 80053), (277, 68493), (289, 65649), (831, 22831), (867, 21883), (1343, 14127), (4029, 4709)]