21065889

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28429}}^1$

素因数の和:28464

約数の個数: 16

約数和(自身を含む): 31841600

約数和(自身を除く): 10775711

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28429, 85287, 369577, 540151, 1108731, 1620453, 7021963, 21065889]

約数ペア:

[(1, 21065889), (3, 7021963), (13, 1620453), (19, 1108731), (39, 540151), (57, 369577), (247, 85287), (741, 28429)]