20842221

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{157}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 31397760

約数和(自身を除く): 10555539

約数列:

[1, 3, 17, 19, 51, 57, 137, 157, 323, 411, 471, 969, 2329, 2603, 2669, 2983, 6987, 7809, 8007, 8949, 21509, 44251, 50711, 64527, 132753, 152133, 365653, 408671, 1096959, 1226013, 6947407, 20842221]

約数ペア:

[(1, 20842221), (3, 6947407), (17, 1226013), (19, 1096959), (51, 408671), (57, 365653), (137, 152133), (157, 132753), (323, 64527), (411, 50711), (471, 44251), (969, 21509), (2329, 8949), (2603, 8007), (2669, 7809), (2983, 6987)]