21169421

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{199}}^1$

素因数の和:393

約数の個数: 24

約数和(自身を含む): 26812800

約数和(自身を除く): 5643379

約数列:

[1, 7, 13, 49, 91, 167, 199, 637, 1169, 1393, 2171, 2587, 8183, 9751, 15197, 18109, 33233, 106379, 126763, 232631, 432029, 1628417, 3024203, 21169421]

約数ペア:

[(1, 21169421), (7, 3024203), (13, 1628417), (49, 432029), (91, 232631), (167, 126763), (199, 106379), (637, 33233), (1169, 18109), (1393, 15197), (2171, 9751), (2587, 8183)]