21716478

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{73}}^1\times {\mathrm{787}}^1$

素因数の和:878

約数の個数: 64

約数和(自身を含む): 55979520

約数和(自身を除く): 34263042

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 73, 126, 146, 189, 219, 378, 438, 511, 657, 787, 1022, 1314, 1533, 1574, 1971, 2361, 3066, 3942, 4599, 4722, 5509, 7083, 9198, 11018, 13797, 14166, 16527, 21249, 27594, 33054, 42498, 49581, 57451, 99162, 114902, 148743, 172353, 297486, 344706, 402157, 517059, 804314, 1034118, 1206471, 1551177, 2412942, 3102354, 3619413, 7238826, 10858239, 21716478]

約数ペア:

[(1, 21716478), (2, 10858239), (3, 7238826), (6, 3619413), (7, 3102354), (9, 2412942), (14, 1551177), (18, 1206471), (21, 1034118), (27, 804314), (42, 517059), (54, 402157), (63, 344706), (73, 297486), (126, 172353), (146, 148743), (189, 114902), (219, 99162), (378, 57451), (438, 49581), (511, 42498), (657, 33054), (787, 27594), (1022, 21249), (1314, 16527), (1533, 14166), (1574, 13797), (1971, 11018), (2361, 9198), (3066, 7083), (3942, 5509), (4599, 4722)]