18985509

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{4987}}^1$

素因数の和:5046

約数の個数: 20

約数和(自身を含む): 28970304

約数和(自身を除く): 9984795

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 4987, 14961, 44883, 134649, 234389, 403947, 703167, 2109501, 6328503, 18985509]

約数ペア:

[(1, 18985509), (3, 6328503), (9, 2109501), (27, 703167), (47, 403947), (81, 234389), (141, 134649), (423, 44883), (1269, 14961), (3807, 4987)]