21871605

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{12253}}^1$

素因数の和:12285

約数の個数: 32

約数和(自身を含む): 42349824

約数和(自身を除く): 20478219

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 12253, 36759, 61265, 85771, 183795, 208301, 257313, 428855, 624903, 1041505, 1286565, 1458107, 3124515, 4374321, 7290535, 21871605]

約数ペア:

[(1, 21871605), (3, 7290535), (5, 4374321), (7, 3124515), (15, 1458107), (17, 1286565), (21, 1041505), (35, 624903), (51, 428855), (85, 257313), (105, 208301), (119, 183795), (255, 85771), (357, 61265), (595, 36759), (1785, 12253)]