21026061

素因数分解:

$3^5\times 7^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:332

約数の個数: 48

約数和(自身を含む): 36900864

約数和(自身を除く): 15874803

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 81, 141, 189, 243, 263, 329, 423, 567, 789, 987, 1269, 1701, 1841, 2367, 2961, 3807, 5523, 7101, 8883, 11421, 12361, 16569, 21303, 26649, 37083, 49707, 63909, 79947, 86527, 111249, 149121, 259581, 333747, 447363, 778743, 1001241, 2336229, 3003723, 7008687, 21026061]

約数ペア:

[(1, 21026061), (3, 7008687), (7, 3003723), (9, 2336229), (21, 1001241), (27, 778743), (47, 447363), (63, 333747), (81, 259581), (141, 149121), (189, 111249), (243, 86527), (263, 79947), (329, 63909), (423, 49707), (567, 37083), (789, 26649), (987, 21303), (1269, 16569), (1701, 12361), (1841, 11421), (2367, 8883), (2961, 7101), (3807, 5523)]