21013209

素因数分解:

$3^3\times 7^3\times {\mathrm{2269}}^1$

素因数の和:2299

約数の個数: 32

約数和(自身を含む): 36320000

約数和(自身を除く): 15306791

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 343, 441, 1029, 1323, 2269, 3087, 6807, 9261, 15883, 20421, 47649, 61263, 111181, 142947, 333543, 428841, 778267, 1000629, 2334801, 3001887, 7004403, 21013209]

約数ペア:

[(1, 21013209), (3, 7004403), (7, 3001887), (9, 2334801), (21, 1000629), (27, 778267), (49, 428841), (63, 333543), (147, 142947), (189, 111181), (343, 61263), (441, 47649), (1029, 20421), (1323, 15883), (2269, 9261), (3087, 6807)]