21108789

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{60139}}^1$

素因数の和:60161

約数の個数: 16

約数和(自身を含む): 33678400

約数和(自身を除く): 12569611

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 60139, 180417, 541251, 781807, 1623753, 2345421, 7036263, 21108789]

約数ペア:

[(1, 21108789), (3, 7036263), (9, 2345421), (13, 1623753), (27, 781807), (39, 541251), (117, 180417), (351, 60139)]