28581111

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:117

約数の個数: 72

約数和(自身を含む): 50244480

約数和(自身を除く): 21663369

約数列:

[1, 3, 9, 13, 19, 23, 39, 43, 57, 69, 117, 129, 169, 171, 207, 247, 299, 387, 437, 507, 559, 741, 817, 897, 989, 1311, 1521, 1677, 2223, 2451, 2691, 2967, 3211, 3887, 3933, 5031, 5681, 7267, 7353, 8901, 9633, 10621, 11661, 12857, 17043, 18791, 21801, 28899, 31863, 34983, 38571, 51129, 56373, 65403, 73853, 95589, 115713, 138073, 167141, 169119, 221559, 244283, 414219, 501423, 664677, 732849, 1242657, 1504269, 2198547, 3175679, 9527037, 28581111]

約数ペア:

[(1, 28581111), (3, 9527037), (9, 3175679), (13, 2198547), (19, 1504269), (23, 1242657), (39, 732849), (43, 664677), (57, 501423), (69, 414219), (117, 244283), (129, 221559), (169, 169119), (171, 167141), (207, 138073), (247, 115713), (299, 95589), (387, 73853), (437, 65403), (507, 56373), (559, 51129), (741, 38571), (817, 34983), (897, 31863), (989, 28899), (1311, 21801), (1521, 18791), (1677, 17043), (2223, 12857), (2451, 11661), (2691, 10621), (2967, 9633), (3211, 8901), (3887, 7353), (3933, 7267), (5031, 5681)]