21132909

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 15932691

約数列:

[1, 3, 7, 9, 21, 29, 43, 63, 87, 129, 203, 261, 269, 301, 387, 609, 807, 903, 1247, 1827, 1883, 2421, 2709, 3741, 5649, 7801, 8729, 11223, 11567, 16947, 23403, 26187, 34701, 54607, 70209, 78561, 80969, 104103, 163821, 242907, 335443, 491463, 728721, 1006329, 2348101, 3018987, 7044303, 21132909]

約数ペア:

[(1, 21132909), (3, 7044303), (7, 3018987), (9, 2348101), (21, 1006329), (29, 728721), (43, 491463), (63, 335443), (87, 242907), (129, 163821), (203, 104103), (261, 80969), (269, 78561), (301, 70209), (387, 54607), (609, 34701), (807, 26187), (903, 23403), (1247, 16947), (1827, 11567), (1883, 11223), (2421, 8729), (2709, 7801), (3741, 5649)]